--- /dev/null
+/* Copyright (C) 2021-2024 Harry Godden (hgn) - All Rights Reserved */
+
+/*
+ * Principles:
+ *
+ * 1. layout is defined by subdividing
+ * 2. a parent node should never be resized by the content after creation
+ * 3. when the ui is in an interactive state, no controls should ever move
+ * 4. controls directly reference a memory location and use that as their
+ * unique id
+ * 5. a maximum of ONE control per memory location can be drawn at any given
+ * point.
+ */
+
+#pragma once
+
+#include "vg_imgui.h"
+#include "vg_engine.h"
+#include "vg_tex.h"
+#include "vg_shader.h"
+#include <string.h>
+
+ui_px k_ui_widget_height = 28,
+ k_ui_scale = 1,
+ k_ui_padding = 8;
+
+ui_font vg_ui_font_small = {
+ .glyph_width = 8,
+ .glyph_height = 14,
+ .glyph_baseline = 4,
+ .line_height = 14,
+ .sheet_size = 256,
+ .spacing = 8,
+ .ascii_start = ' ',
+ .offset_y = 0
+},
+vg_ui_font_big = {
+ .glyph_width = 12,
+ .glyph_height = 21,
+ .glyph_baseline = 6,
+ .line_height = 21,
+ .sheet_size = 256,
+ .spacing = 10,
+ .ascii_start = ' ',
+ .offset_y = 84
+};
+
+struct vg_imgui vg_ui = {
+ .scheme = {
+ [ k_ui_bg+0 ] = UI_RGB( 0x1d2021 ),
+ [ k_ui_bg+1 ] = UI_RGB( 0x282828 ),
+ [ k_ui_bg+2 ] = UI_RGB( 0x3c3836 ),
+ [ k_ui_bg+3 ] = UI_RGB( 0x504945 ),
+ [ k_ui_bg+4 ] = UI_RGB( 0x665c54 ),
+ [ k_ui_bg+5 ] = UI_RGB( 0x7c6f64 ),
+ [ k_ui_bg+6 ] = UI_RGB( 0x928374 ),
+ [ k_ui_bg+7 ] = UI_RGB( 0xa89984 ),
+
+ [ k_ui_fg+0 ] = UI_RGB( 0xebdbb2 ),
+ [ k_ui_fg+1 ] = UI_RGB( 0xfbf1c7 ),
+ [ k_ui_fg+2 ] = UI_RGB( 0xd5c4a1 ),
+ [ k_ui_fg+3 ] = UI_RGB( 0xbdae93 ),
+ [ k_ui_fg+4 ] = UI_RGB( 0xa89984 ),
+ [ k_ui_fg+5 ] = UI_RGB( 0x000000 ),
+ [ k_ui_fg+6 ] = UI_RGB( 0x000000 ),
+ [ k_ui_fg+7 ] = UI_RGB( 0x000000 ),
+
+ [ k_ui_red ] = UI_RGB( 0xcc241d ),
+ [ k_ui_orange ] = UI_RGB( 0xd65d0e ),
+ [ k_ui_yellow ] = UI_RGB( 0xd79921 ),
+ [ k_ui_green ] = UI_RGB( 0x98971a ),
+ [ k_ui_aqua ] = UI_RGB( 0x689d6a ),
+ [ k_ui_blue ] = UI_RGB( 0x458588 ),
+ [ k_ui_purple ] = UI_RGB( 0xb16286 ),
+ [ k_ui_gray ] = UI_RGB( 0x928374 ),
+ [ k_ui_red + k_ui_brighter ] = UI_RGB( 0xfb4934 ),
+ [ k_ui_orange + k_ui_brighter ] = UI_RGB( 0xfe8019 ),
+ [ k_ui_yellow + k_ui_brighter ] = UI_RGB( 0xfabd2f ),
+ [ k_ui_green + k_ui_brighter ] = UI_RGB( 0xb8bb26 ),
+ [ k_ui_aqua + k_ui_brighter ] = UI_RGB( 0x8ec07c ),
+ [ k_ui_blue + k_ui_brighter ] = UI_RGB( 0x83a598 ),
+ [ k_ui_purple + k_ui_brighter ] = UI_RGB( 0xd3869b ),
+ [ k_ui_gray + k_ui_brighter ] = UI_RGB( 0xa89984 ),
+ },
+ .font = &vg_ui_font_small,
+ .colour = {1.0f,1.0f,1.0f,1.0f},
+ .bg_inverse_ratio = {1,1}
+};
+
+static struct vg_shader _shader_ui ={
+ .name = "[vg] ui - transparent",
+ .link = NULL,
+ .vs = {
+ .orig_file = NULL,
+ .static_src =
+ "layout (location=0) in vec2 a_co;"
+ "layout (location=1) in vec2 a_uv;"
+ "layout (location=2) in vec4 a_colour;"
+ "uniform mat3 uPv;"
+ "uniform vec2 uBGInverseRatio;"
+ ""
+ "out vec4 aTexCoords;"
+ "out vec4 aColour;"
+ ""
+ "void main(){"
+ "vec4 proj_pos = vec4( uPv * vec3( a_co, 1.0 ), 1.0 );"
+ "gl_Position = proj_pos;"
+ "aTexCoords = vec4( a_uv * 0.00390625, "
+ " (proj_pos.xy*0.5+0.5) * uBGInverseRatio );"
+ "aColour = a_colour;"
+ "}",
+ },
+ .fs = {
+ .orig_file = NULL,
+ .static_src =
+ "uniform sampler2D uTexGlyphs;"
+ "uniform sampler2D uTexBG;"
+ "uniform vec4 uColour;"
+ "uniform float uSpread;"
+ "out vec4 FragColor;"
+ ""
+ "in vec4 aTexCoords;"
+ "in vec4 aColour;"
+ ""
+ "vec2 rand_hash22( vec2 p ){"
+ "vec3 p3 = fract(vec3(p.xyx) * 213.8976123);"
+ "p3 += dot(p3, p3.yzx+19.19);"
+ "return fract(vec2((p3.x + p3.y)*p3.z, (p3.x+p3.z)*p3.y));"
+ "}"
+ ""
+ "void main(){"
+ "vec4 diffuse = aColour;"
+
+ "vec4 avg = vec4(0.0);"
+
+ "if( aColour.a == 0.0 ){"
+ "avg = aColour;"
+ "avg.a = texture( uTexGlyphs, aTexCoords.xy ).r;"
+ "}"
+ "else{"
+ "if( uSpread > 0.0001 ){"
+ "for( int i=0; i<4; i ++ ){"
+ "vec2 spread = rand_hash22(aTexCoords.zw+vec2(float(i)));"
+ "avg += texture( uTexBG, aTexCoords.zw + (spread-0.5)*uSpread );"
+ "}"
+ "avg *= 0.25;"
+ "avg.a = 1.0;"
+ "avg.rgb = mix( avg.rgb, aColour.rgb, aColour.a );"
+ "}"
+ "else{"
+ "avg = aColour;"
+ "}"
+ "}"
+
+ "FragColor = avg * uColour;"
+ "}"
+ }
+};
+
+static struct vg_shader _shader_ui_image = {
+ .name = "[vg] ui_image",
+ .link = NULL,
+ .vs =
+ {
+ .orig_file = NULL,
+ .static_src =
+ "layout (location=0) in vec2 a_co;"
+ "layout (location=1) in vec2 a_uv;"
+ "layout (location=2) in vec4 a_colour;"
+ "uniform mat3 uPv;"
+
+ "out vec2 aTexCoords;"
+ "out vec4 aColour;"
+ "out vec2 aWsp;"
+
+ "void main()"
+ "{"
+ "gl_Position = vec4( uPv * vec3( a_co, 1.0 ), 1.0 );"
+ "aTexCoords = a_uv * 0.00390625;"
+ "aColour = a_colour;"
+
+ "aWsp = a_co;"
+ "}",
+ },
+ .fs =
+ {
+ .orig_file = NULL,
+ .static_src =
+ "uniform sampler2D uTexImage;"
+ "uniform vec4 uColour;"
+ "out vec4 FragColor;"
+
+ "in vec2 aTexCoords;"
+ "in vec4 aColour;"
+ "in vec2 aWsp;"
+
+ "void main()"
+ "{"
+ "vec4 colour = texture( uTexImage, aTexCoords );"
+ "FragColor = colour * uColour;"
+ "}"
+ }
+};
+
+static struct vg_shader _shader_ui_hsv = {
+ .name = "[vg] ui_hsv",
+ .link = NULL,
+ .vs = {
+ .orig_file = NULL,
+ .static_src =
+ "layout (location=0) in vec2 a_co;"
+ "layout (location=1) in vec2 a_uv;"
+ "layout (location=2) in vec4 a_colour;"
+ "uniform mat3 uPv;"
+
+ "out vec2 aTexCoords;"
+ "out vec4 aColour;"
+ "out vec2 aWsp;"
+
+ "void main()"
+ "{"
+ "gl_Position = vec4( uPv * vec3( a_co, 1.0 ), 1.0 );"
+ "aTexCoords = a_uv * 0.00390625;"
+ "aColour = a_colour;"
+
+ "aWsp = a_co;"
+ "}",
+ },
+ .fs =
+ {
+ .orig_file = NULL,
+ .static_src =
+ "uniform float uHue;"
+ "out vec4 FragColor;"
+
+ "in vec2 aTexCoords;"
+ "in vec4 aColour;"
+ "in vec2 aWsp;"
+
+ "void main()"
+ "{"
+ "vec3 c = vec3( uHue, aTexCoords );"
+ "vec4 K = vec4(1.0,2.0/3.0,1.0/3.0,3.0);"
+ "vec3 p = abs(fract(c.xxx+K.xyz)*6.0 - K.www);"
+ "vec3 colour = c.z*mix(K.xxx,clamp(p-K.xxx,0.0,1.0),c.y);"
+ "FragColor = vec4( colour, 1.0 );"
+ "}"
+ }
+};
+
+void vg_ui_init(void)
+{
+ if( !vg_shader_compile( &_shader_ui ) ||
+ !vg_shader_compile( &_shader_ui_image ) ||
+ !vg_shader_compile( &_shader_ui_hsv ) ){
+ vg_fatal_error( "Failed to compile ui shader" );
+ }
+
+ /*
+ * Vertex buffer
+ * ----------------------------------------
+ */
+
+ vg_ui.max_indices = 20000;
+ vg_ui.max_verts = 30000;
+
+ /* Generate the buffer we are gonna be drawing to */
+ glGenVertexArrays( 1, &vg_ui.vao );
+ glGenBuffers( 1, &vg_ui.vbo );
+ glGenBuffers( 1, &vg_ui.ebo );
+
+ glBindVertexArray( vg_ui.vao );
+ glBindBuffer( GL_ARRAY_BUFFER, vg_ui.vbo );
+
+ glBufferData( GL_ARRAY_BUFFER,
+ vg_ui.max_verts * sizeof( struct ui_vert ),
+ NULL, GL_DYNAMIC_DRAW );
+ glBindVertexArray( vg_ui.vao );
+
+ glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, vg_ui.ebo );
+ glBufferData( GL_ELEMENT_ARRAY_BUFFER,
+ vg_ui.max_indices * sizeof( u16 ), NULL, GL_DYNAMIC_DRAW );
+
+ VG_CHECK_GL_ERR();
+
+ /* Set pointers */
+ u32 const stride = sizeof( struct ui_vert );
+
+ /* XY */
+ glVertexAttribPointer( 0, 2, GL_SHORT, GL_FALSE, stride,
+ (void *)offsetof( struct ui_vert, co ) );
+ glEnableVertexAttribArray( 0 );
+
+ /* UV */
+ glVertexAttribPointer( 1, 2, GL_UNSIGNED_SHORT, GL_FALSE, stride,
+ (void *)offsetof( struct ui_vert, uv ) );
+ glEnableVertexAttribArray( 1 );
+
+ /* COLOUR */
+ glVertexAttribPointer( 2, 4, GL_UNSIGNED_BYTE, GL_TRUE, stride,
+ (void *)offsetof( struct ui_vert, colour ) );
+ glEnableVertexAttribArray( 2 );
+
+ VG_CHECK_GL_ERR();
+
+ /* Alloc RAM default context */
+ u32 vert_size = vg_ui.max_verts*sizeof(struct ui_vert),
+ inds_size = vg_align8( vg_ui.max_indices*sizeof(u16) );
+
+ vg_ui.vertex_buffer = vg_linear_alloc( vg_mem.rtmemory, vert_size );
+ vg_ui.indice_buffer = vg_linear_alloc( vg_mem.rtmemory, inds_size );
+
+ /* font
+ * -----------------------------------------------------
+ */
+
+ /* Load default font */
+ u32 compressed[] = {
+ #include "vg/vg_pxfont_thin.h"
+ };
+
+ u32 pixels = 0, total = 256*256, data = 0;
+ u8 image[256*256];
+
+ while( pixels < total ){
+ for( int b = 31; b >= 0; b-- ){
+ image[ pixels ++ ] = (compressed[data] & (0x1u << b))? 0xffu: 0x00u;
+
+ if( pixels >= total ){
+ total = 0;
+ break;
+ }
+ }
+ data++;
+ }
+
+ glGenTextures( 1, &vg_ui.tex_glyphs );
+ glBindTexture( GL_TEXTURE_2D, vg_ui.tex_glyphs );
+ glTexImage2D( GL_TEXTURE_2D, 0, GL_R8, 256, 256, 0,
+ GL_RED, GL_UNSIGNED_BYTE, image );
+
+ VG_CHECK_GL_ERR();
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
+
+ /*
+ * Cursors
+ * ---------------------------------------------------------------
+ */
+
+ vg_ui.cursor_map[ k_ui_cursor_default ] =
+ SDL_CreateSystemCursor( SDL_SYSTEM_CURSOR_ARROW );
+ vg_ui.cursor_map[ k_ui_cursor_hand ] =
+ SDL_CreateSystemCursor( SDL_SYSTEM_CURSOR_HAND );
+ vg_ui.cursor_map[ k_ui_cursor_ibeam ] =
+ SDL_CreateSystemCursor( SDL_SYSTEM_CURSOR_IBEAM );
+}
+
+void rect_copy( ui_rect a, ui_rect b ){
+ for( int i=0; i<4; i++ )
+ b[i] = a[i];
+}
+
+void ui_flush( enum ui_shader shader, f32 w, f32 h ){
+ u32 vertex_offset = vg_ui.vert_start*sizeof(ui_vert),
+ vertex_count = vg_ui.cur_vert-vg_ui.vert_start,
+ vertex_size = vertex_count*sizeof(ui_vert),
+
+ indice_offset = vg_ui.indice_start*sizeof(u16),
+ indice_count = vg_ui.cur_indice-vg_ui.indice_start,
+ indice_size = indice_count * sizeof(u16);
+
+ if( !vertex_size || !indice_size )
+ return;
+
+ glBindVertexArray( vg_ui.vao );
+ glBindBuffer( GL_ARRAY_BUFFER, vg_ui.vbo );
+ glBufferSubData( GL_ARRAY_BUFFER, vertex_offset, vertex_size,
+ vg_ui.vertex_buffer+vg_ui.vert_start );
+
+ glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, vg_ui.ebo );
+ glBufferSubData( GL_ELEMENT_ARRAY_BUFFER, indice_offset, indice_size,
+ vg_ui.indice_buffer+vg_ui.indice_start );
+
+ glDisable( GL_DEPTH_TEST );
+ glEnable( GL_BLEND );
+ glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
+ glBlendEquation( GL_FUNC_ADD );
+ glDisable( GL_CULL_FACE );
+
+ m3x3f view = M3X3_IDENTITY;
+ m3x3_translate( view, (v3f){ -1.0f, 1.0f, 0.0f } );
+ m3x3_scale( view, (v3f){ 1.0f/(w*0.5f),
+ -1.0f/(h*0.5f), 1.0f } );
+
+ if( shader == k_ui_shader_colour ){
+ glUseProgram( _shader_ui.id );
+
+ glUniformMatrix3fv( glGetUniformLocation( _shader_ui.id, "uPv" ), 1,
+ GL_FALSE, (float *)view );
+ glUniform4fv( glGetUniformLocation( _shader_ui.id, "uColour" ), 1,
+ vg_ui.colour );
+
+ glActiveTexture( GL_TEXTURE0 );
+ glBindTexture( GL_TEXTURE_2D, vg_ui.tex_glyphs );
+ glUniform1i( glGetUniformLocation( _shader_ui.id, "uTexGlyphs" ), 0 );
+
+ glActiveTexture( GL_TEXTURE1 );
+ glBindTexture( GL_TEXTURE_2D, vg_ui.tex_bg );
+ glUniform1i( glGetUniformLocation( _shader_ui.id, "uTexBG" ), 1 );
+ glUniform1f( glGetUniformLocation( _shader_ui.id, "uSpread" ),
+ vg_ui.frosting );
+ glUniform2fv( glGetUniformLocation( _shader_ui.id, "uBGInverseRatio" ),
+ 1, vg_ui.bg_inverse_ratio );
+ }
+ else if( shader == k_ui_shader_image ){
+ glUseProgram( _shader_ui_image.id );
+ glUniformMatrix3fv( glGetUniformLocation( _shader_ui_image.id, "uPv" ), 1,
+ GL_FALSE, (float *)view );
+ glUniform1i( glGetUniformLocation(_shader_ui_image.id,"uTexImage"), 0 );
+ glUniform4fv( glGetUniformLocation( _shader_ui_image.id, "uColour" ), 1,
+ vg_ui.colour );
+ }
+ else if( shader == k_ui_shader_hsv ){
+ glUseProgram( _shader_ui_hsv.id );
+ glUniformMatrix3fv( glGetUniformLocation( _shader_ui_hsv.id, "uPv" ), 1,
+ GL_FALSE, (float *)view );
+ glUniform1f( glGetUniformLocation(_shader_ui_hsv.id,"uHue"), vg_ui.hue );
+ }
+ else
+ vg_fatal_error( "Invalid UI shader (%d)\n", shader );
+
+ glDrawElements( GL_TRIANGLES, indice_count, GL_UNSIGNED_SHORT,
+ (void *)(vg_ui.indice_start*sizeof(u16)) );
+
+ glDisable( GL_BLEND );
+
+ vg_ui.indice_start = vg_ui.cur_indice;
+ vg_ui.vert_start = vg_ui.cur_vert;
+}
+
+void ui_fill_rect( ui_rect rect, u32 colour, ui_px uv[4] )
+{
+ /* this if far from ideal but stops us from crashing */
+ if( (vg_ui.cur_vert + 4 > vg_ui.max_verts) ||
+ (vg_ui.cur_indice + 6 > vg_ui.max_indices))
+ return;
+
+ struct ui_vert *vertices = &vg_ui.vertex_buffer[ vg_ui.cur_vert ];
+ u16 *indices = &vg_ui.indice_buffer[ vg_ui.cur_indice ];
+
+ for( int i=0; i<4; i++ ){
+ vertices[i].colour = colour;
+ }
+
+ vertices[0].co[0] = rect[0];
+ vertices[0].co[1] = rect[1];
+ vertices[0].uv[0] = uv[0];
+ vertices[0].uv[1] = uv[1];
+ vertices[1].co[0] = rect[0]+rect[2];
+ vertices[1].co[1] = rect[1];
+ vertices[1].uv[0] = uv[2];
+ vertices[1].uv[1] = uv[1];
+ vertices[2].co[0] = rect[0]+rect[2];
+ vertices[2].co[1] = rect[1]+rect[3];
+ vertices[2].uv[0] = uv[2];
+ vertices[2].uv[1] = uv[3];
+ vertices[3].co[0] = rect[0];
+ vertices[3].co[1] = rect[1]+rect[3];
+ vertices[3].uv[0] = uv[0];
+ vertices[3].uv[1] = uv[3];
+ u16 ind_start = vg_ui.cur_vert;
+
+ u16 start = vg_ui.cur_vert;
+ u32 mesh[] = { 0,2,1, 0,3,2 };
+
+ for( u32 i=0; i<vg_list_size(mesh); i++ ){
+ indices[i] = start+mesh[i];
+ }
+
+ vg_ui.cur_indice += 6;
+ vg_ui.cur_vert += 4;
+}
+
+void ui_fill( ui_rect rect, u32 colour )
+{
+ ui_fill_rect( rect, colour, (ui_px[4]){ 4,4,4,4 } );
+}
+
+void ui_outline( ui_rect rect, ui_px thickness, u32 colour, u32 mask )
+{
+ /* this if far from ideal but stops us from crashing */
+ if( (vg_ui.cur_vert + 8 > vg_ui.max_verts) ||
+ (vg_ui.cur_indice + 24 > vg_ui.max_indices))
+ return;
+
+ struct ui_vert *vertices = &vg_ui.vertex_buffer[ vg_ui.cur_vert ];
+ u16 *indices = &vg_ui.indice_buffer[ vg_ui.cur_indice ];
+
+ for( int i=0; i<8; i++ ){
+ vertices[i].uv[0] = 4;
+ vertices[i].uv[1] = 4;
+ vertices[i].colour = colour;
+ }
+
+ vertices[0].co[0] = rect[0];
+ vertices[0].co[1] = rect[1];
+ vertices[1].co[0] = rect[0]+rect[2];
+ vertices[1].co[1] = rect[1];
+ vertices[2].co[0] = rect[0]+rect[2];
+ vertices[2].co[1] = rect[1]+rect[3];
+ vertices[3].co[0] = rect[0];
+ vertices[3].co[1] = rect[1]+rect[3];
+ vertices[4].co[0] = vertices[0].co[0]-thickness;
+ vertices[4].co[1] = vertices[0].co[1]-thickness;
+ vertices[5].co[0] = vertices[1].co[0]+thickness;
+ vertices[5].co[1] = vertices[1].co[1]-thickness;
+ vertices[6].co[0] = vertices[2].co[0]+thickness;
+ vertices[6].co[1] = vertices[2].co[1]+thickness;
+ vertices[7].co[0] = vertices[3].co[0]-thickness;
+ vertices[7].co[1] = vertices[3].co[1]+thickness;
+
+ u16 start = vg_ui.cur_vert;
+ u32 mesh[] = { 0,5,4, 0,1,5, 1,6,5, 1,2,6, 2,7,6, 2,3,7, 3,4,7, 3,0,4 };
+
+ if( !mask )
+ mask = UI_TOP|UI_LEFT|UI_BOTTOM|UI_RIGHT;
+
+ u32 c = 0;
+ for( u32 i=0; i<vg_list_size(mesh)/6; i++ ){
+ if( (0x1<<i) & mask ){
+ for( u32 j=0; j<6; j++ )
+ indices[c ++] = start+mesh[i*6+j];
+ }
+ }
+
+ vg_ui.cur_indice += c;
+ vg_ui.cur_vert += 8;
+}
+
+void ui_split( ui_rect rect, enum ui_axis other, ui_px width, ui_px gap,
+ ui_rect l, ui_rect r ){
+ enum ui_axis dir = other ^ 0x1;
+
+ if( width < 0 ) width = rect[ 2+dir ] + width;
+
+ ui_rect temp;
+ rect_copy( rect, temp );
+
+ l[ dir ] = temp[ dir ];
+ r[ dir ] = temp[ dir ] + width + (gap/2);
+ l[ other ] = temp[ other ];
+ r[ other ] = temp[ other ];
+ l[ 2+dir ] = width - (gap/2);
+ r[ 2+dir ] = temp[ 2+dir ] - width - (gap/2);
+ l[ 2+other ] = temp[ 2+other ];
+ r[ 2+other ] = temp[ 2+other ];
+}
+
+void ui_rect_center( ui_rect parent, ui_rect rect )
+{
+ rect[0] = parent[0] + (parent[2]-rect[2])/2;
+ rect[1] = parent[1] + (parent[3]-rect[3])/2;
+}
+
+void ui_fit_item( ui_rect rect, ui_px size[2], ui_rect d )
+{
+ i32 rp = (i32)rect[2] * (i32)size[1],
+ rc = (i32)size[0] * (i32)rect[3];
+
+ enum ui_axis dir, other;
+ if( rc > rp ) dir = k_ui_axis_h;
+ else dir = k_ui_axis_v;
+ other = dir ^ 0x1;
+
+ d[2+dir] = rect[2+dir];
+ d[2+other] = (rect[2+dir] * size[other]) / size[dir];
+
+ ui_rect_center( rect, d );
+}
+
+void ui_split_ratio( ui_rect rect, enum ui_axis dir, float ratio,
+ ui_px gap, ui_rect l, ui_rect r )
+{
+ ui_px width = (float)rect[ 2+(dir^0x1) ] * ratio;
+ ui_split( rect, dir, width, gap, l, r );
+}
+
+void ui_rect_pad( ui_rect rect, ui_px pad[2] )
+{
+ rect[0] += pad[0];
+ rect[1] += pad[1];
+ rect[2] -= pad[0]*2;
+ rect[3] -= pad[1]*2;
+}
+
+ui_px ui_text_line_width( const char *str )
+{
+ int length = 0;
+ const char *_c = str;
+ u8 c;
+
+ while( (c = *(_c ++)) ){
+ if( c >= 32 ) length ++;
+ else if( c == '\n' ) break;
+ }
+
+ return length * vg_ui.font->spacing;
+}
+
+ui_px ui_text_string_height( const char *str )
+{
+ int height = 1;
+ const char *_c = str;
+ u8 c;
+
+ while( (c = *(_c ++)) ){
+ if( c == '\n' ) height ++;
+ }
+
+ return height * 14;
+}
+
+ui_px ui_text_aligned_x( const char *str, ui_rect rect, ui_px scale,
+ enum ui_align align )
+{
+ enum ui_align lwr = k_ui_align_lwr & align;
+ if( lwr == k_ui_align_left ){
+ return rect[0];
+ }
+ else{
+ ui_px width = ui_text_line_width( str ) * scale;
+
+ if( lwr == k_ui_align_right )
+ return rect[0] + rect[2]-width;
+ else
+ return rect[0] + (rect[2]-width)/2;
+ }
+}
+
+static ui_px ui_min( ui_px a, ui_px b ){ return a<b?a:b; }
+static ui_px ui_max( ui_px a, ui_px b ){ return a>b?a:b; }
+static ui_px ui_clamp( ui_px a, ui_px min, ui_px max ){
+ return ui_min( max, ui_max( a, min ) );
+}
+
+int ui_clip( ui_rect parent, ui_rect child, ui_rect clipped )
+{
+ ui_px parent_max[2], child_max[2];
+ parent_max[0] = parent[0]+parent[2];
+ parent_max[1] = parent[1]+parent[3];
+ child_max[0] = child[0]+child[2];
+ child_max[1] = child[1]+child[3];
+
+ clipped[0] = ui_clamp( child[0], parent[0], parent_max[0] );
+ clipped[1] = ui_clamp( child[1], parent[1], parent_max[1] );
+ clipped[2] = ui_clamp( child_max[0], parent[0], parent_max[0] );
+ clipped[3] = ui_clamp( child_max[1], parent[1], parent_max[1] );
+
+ if( clipped[0] == clipped[2] ||
+ clipped[1] == clipped[3] )
+ return 0;
+
+ clipped[2] -= clipped[0];
+ clipped[3] -= clipped[1];
+
+ return 1;
+}
+
+int ui_inside_rect( ui_rect rect, ui_px co[2] )
+{
+ if( co[0] >= rect[0] &&
+ co[1] >= rect[1] &&
+ co[0] < rect[0]+rect[2] &&
+ co[1] < rect[1]+rect[3] ){
+ return 1;
+ }
+ else
+ return 0;
+}
+
+int ui_click_down( u32 mask )
+{
+ if( vg_ui.ignore_input_frames ) return 0;
+ if( (vg_ui.mouse_state[0] & mask) &&
+ !(vg_ui.mouse_state[1] & mask) )
+ return 1;
+ else
+ return 0;
+}
+
+int ui_clicking( u32 mask )
+{
+ if( vg_ui.ignore_input_frames ) return 0;
+ return vg_ui.mouse_state[0] & mask;
+}
+
+int ui_click_up( u32 mask )
+{
+ if( vg_ui.ignore_input_frames ) return 0;
+ if( (vg_ui.mouse_state[1] & mask) &&
+ !(vg_ui.mouse_state[0] & mask) )
+ return 1;
+ else
+ return 0;
+}
+
+void ui_prerender(void)
+{
+ int x, y;
+ vg_ui.mouse_state[1] = vg_ui.mouse_state[0];
+ vg_ui.mouse_state[0] = SDL_GetMouseState( &x, &y );
+ vg_ui.mouse_delta[0] = x-vg_ui.mouse[0];
+ vg_ui.mouse_delta[1] = y-vg_ui.mouse[1];
+ vg_ui.mouse[0] = x;
+ vg_ui.mouse[1] = y;
+
+ vg_ui.cur_vert = 0;
+ vg_ui.cur_indice = 0;
+ vg_ui.vert_start = 0;
+ vg_ui.indice_start = 0;
+ vg_ui.focused_control_hit = 0;
+ vg_ui.cursor = k_ui_cursor_default;
+ vg_ui.wants_mouse = 0;
+
+ if( vg_ui.ignore_input_frames ){
+ vg_ui.ignore_input_frames --;
+ return;
+ }
+
+ if( ui_click_down(UI_MOUSE_LEFT)||ui_click_down(UI_MOUSE_MIDDLE) ){
+ vg_ui.mouse_click[0] = vg_ui.mouse[0];
+ vg_ui.mouse_click[1] = vg_ui.mouse[1];
+ }
+}
+
+u32 ui_colour( enum ui_scheme_colour id )
+{
+ return vg_ui.scheme[ id ];
+}
+
+/* get an appropriately contrasting colour given the base */
+u32 ui_colourcont( enum ui_scheme_colour id )
+{
+ if ( id < k_ui_bg+6 ) return ui_colour( k_ui_fg );
+ else if( id < k_ui_fg ) return ui_colour( k_ui_bg+1 );
+ else if( id < k_ui_hue ) return ui_colour( k_ui_bg+3 );
+ else if( id < k_ui_red+k_ui_brighter ) return ui_colour( k_ui_fg );
+ else return ui_colour( k_ui_fg+1 );
+}
+
+void ui_hex_to_norm( u32 hex, v4f norm )
+{
+ norm[0] = ((hex ) & 0xff);
+ norm[1] = ((hex>>8 ) & 0xff);
+ norm[2] = ((hex>>16) & 0xff);
+ norm[3] = ((hex>>24) & 0xff);
+ v4_muls( norm, 1.0f/255.0f, norm );
+}
+
+u32 v4f_u32_colour( v4f colour )
+{
+ u32 r = colour[0] * 255.0f,
+ g = colour[1] * 255.0f,
+ b = colour[2] * 255.0f,
+ a = colour[3] * 255.0f;
+
+ return r | (g<<8) | (b<<16) | (a<<24);
+}
+
+static void ui_text_glyph( const struct ui_font *font, ui_px scale,
+ u8 glyph, ui_rect out_texcoords ){
+ glyph -= font->ascii_start;
+
+ ui_px per_row = font->sheet_size / font->glyph_width,
+ column = (ui_px)glyph % per_row,
+ row = (glyph - column) / per_row;
+
+ out_texcoords[0] = column * font->glyph_width;
+ out_texcoords[1] = row * font->glyph_height + font->offset_y;
+ out_texcoords[2] = out_texcoords[0] + font->glyph_width;
+ out_texcoords[3] = out_texcoords[1] + font->glyph_height;
+}
+
+u32 ui_opacity( u32 colour, f32 opacity )
+{
+ u32 alpha = opacity * 255.0f;
+ return (colour & 0x00ffffff) | (alpha << 24);
+}
+
+u32 ui_ntext( ui_rect rect, const char *str, u32 len, ui_px scale,
+ enum ui_align align, u32 colour )
+{
+ ui_rect text_cursor;
+ if( colour == 0 ) colour = ui_colour( k_ui_fg );
+
+ colour &= 0x00ffffff;
+
+ const char *_c = str;
+ u8 c;
+
+ text_cursor[0] = ui_text_aligned_x( str, rect, scale, align );
+ text_cursor[1] = rect[1];
+ text_cursor[2] = vg_ui.font->glyph_width*scale;
+ text_cursor[3] = vg_ui.font->glyph_height*scale;
+
+ u32 printed_chars = 0;
+
+ if( align & (k_ui_align_middle|k_ui_align_bottom) ){
+ ui_px height = ui_text_string_height( str ) * scale;
+
+ if( align & k_ui_align_bottom )
+ text_cursor[1] += rect[3]-height;
+ else
+ text_cursor[1] += (rect[3]-height)/2;
+ }
+
+ while( (c = *(_c ++)) ){
+ if( printed_chars >= len ){
+ printed_chars = 0;
+ text_cursor[1] += vg_ui.font->line_height*scale;
+ text_cursor[0] = ui_text_aligned_x( _c, rect, scale, align );
+ text_cursor[0] -= vg_ui.font->spacing*scale;
+
+ ui_rect glyph;
+ ui_text_glyph( vg_ui.font, scale, '\xb6' /*FIXME*/, glyph );
+ ui_fill_rect( text_cursor, 0x00ffffff, glyph );
+ text_cursor[0] += vg_ui.font->spacing*scale;
+ }
+
+ if( c == '\n' ){
+ text_cursor[1] += vg_ui.font->line_height*scale;
+ text_cursor[0] = ui_text_aligned_x( _c, rect, scale, align );
+ printed_chars = 0;
+ continue;
+ }
+ else if( c >= 33 ){
+ ui_rect glyph;
+ ui_text_glyph( vg_ui.font, scale, c, glyph );
+
+ ui_rect cursor_clipped;
+ if( ui_clip( rect, text_cursor, cursor_clipped ) ){
+ ui_fill_rect( cursor_clipped, colour, glyph );
+ }
+ }
+ else if( c == '\x1B' ){
+ /* vt codes */
+ _c ++;
+ u16 colour_id = 0;
+ for( int i=0; i<3; i ++ ){
+ if( _c[i] ){
+ if( _c[i] == 'm' ){
+ _c = _c + i + 1;
+
+ switch( colour_id ){
+ case '0': colour = ui_colour( k_ui_fg ); break;
+ case '3'|'0'<<8: colour = ui_colour( k_ui_bg ); break;
+ case '3'|'1'<<8: colour = ui_colour( k_ui_red ); break;
+ case '3'|'2'<<8: colour = ui_colour( k_ui_green ); break;
+ case '3'|'3'<<8: colour = ui_colour( k_ui_yellow ); break;
+ case '3'|'4'<<8: colour = ui_colour( k_ui_blue ); break;
+ case '3'|'5'<<8: colour = ui_colour( k_ui_purple ); break;
+ case '3'|'6'<<8: colour = ui_colour( k_ui_aqua ); break;
+ case '3'|'7'<<8: colour = 0xffffffff; break;
+ }
+
+ colour &= 0x00ffffff;
+ break;
+ }
+
+ colour_id |= _c[i] << (i*8);
+ }
+ else{
+ _c = _c +i;
+ break;
+ }
+ }
+
+ continue;
+ }
+ else if( c == '\t' ){
+ text_cursor[0] += vg_ui.font->spacing*scale*4;
+ printed_chars += 4;
+ continue;
+ }
+
+ text_cursor[0] += vg_ui.font->spacing*scale;
+ printed_chars ++;
+ }
+
+ return printed_chars;
+}
+
+void ui_text( ui_rect rect, const char *str, ui_px scale,
+ enum ui_align align, u32 colour )
+{
+ ui_ntext( rect, str, 1024, scale, align, colour );
+}
+
+/*
+ * Standard layout stuff
+ * -----------------------------------------------------------------------------
+ */
+
+void ui_panel( ui_rect in_rect, ui_rect out_panel )
+{
+ ui_fill( in_rect, ui_colour( k_ui_bg+1 ) );
+ ui_outline( in_rect, 1, ui_colour( k_ui_bg+7 ), 0 );
+ rect_copy( in_rect, out_panel );
+ ui_rect_pad( out_panel, (ui_px[2]){ k_ui_padding, k_ui_padding } );
+}
+
+void ui_label( ui_rect rect, const char *text, ui_px size,
+ ui_px gap, ui_rect r )
+{
+ ui_rect l;
+ ui_px width = (ui_text_line_width(text)+vg_ui.font->spacing) * size;
+ ui_split( rect, k_ui_axis_v, width, gap, l, r );
+ ui_text( l, text, 1, k_ui_align_middle_left, 0 );
+}
+
+void ui_standard_widget( ui_rect inout_panel, ui_rect out_rect, ui_px count )
+{
+ ui_px height = (count * vg_ui.font->glyph_height + 18) * k_ui_scale;
+ ui_split( inout_panel, k_ui_axis_h, height, k_ui_padding,
+ out_rect, inout_panel );
+}
+
+void ui_info( ui_rect inout_panel, const char *text )
+{
+ ui_rect box;
+ ui_standard_widget( inout_panel, box, 1 );
+ ui_text( box, text, 1, k_ui_align_middle_left, 0 );
+}
+
+void ui_image( ui_rect rect, GLuint image )
+{
+ ui_flush( k_ui_shader_colour, vg.window_x, vg.window_y );
+ glActiveTexture( GL_TEXTURE0 );
+ glBindTexture( GL_TEXTURE_2D, image );
+ ui_fill_rect( rect, 0xffffffff, (ui_px[4]){ 0,256,256,0 } );
+ ui_flush( k_ui_shader_image, vg.window_x, vg.window_y );
+}
+
+void ui_defocus_all(void)
+{
+ if( vg_ui.focused_control_type == k_ui_control_textbox ){
+ SDL_StopTextInput();
+ if( vg_ui.textbox.callbacks.escape )
+ vg_ui.textbox.callbacks.escape();
+ }
+
+ vg_ui.focused_control_id = NULL;
+ vg_ui.focused_control_hit = 0;
+ vg_ui.focused_control_type = k_ui_control_none;
+}
+
+/* TODO: split this out into a formatless button and one that auto fills */
+enum ui_button_state ui_colourbutton( ui_rect rect,
+ enum ui_scheme_colour colour,
+ enum ui_scheme_colour hover_colour,
+ enum ui_scheme_colour hi_colour,
+ bool const fill )
+{
+ int clickup= ui_click_up(UI_MOUSE_LEFT),
+ click = ui_clicking(UI_MOUSE_LEFT) | clickup,
+ target = ui_inside_rect( rect, vg_ui.mouse_click ) && click,
+ hover = ui_inside_rect( rect, vg_ui.mouse );
+
+ u32 col_base = vg_ui.scheme[ colour ],
+ col_highlight = vg_ui.scheme[ hi_colour? hi_colour: k_ui_fg ],
+ col_hover = vg_ui.scheme[ hover_colour? hover_colour:
+ colour + k_ui_brighter ];
+
+ if( vg_ui.focused_control_type != k_ui_control_none ){
+ clickup = 0;
+ click = 0;
+ target = 0;
+ hover = 0;
+ }
+
+ if( hover ){
+ vg_ui.cursor = k_ui_cursor_hand;
+ }
+
+ if( click ){
+ if( target ){
+ if( hover ){
+ if( clickup ){
+ vg_ui.ignore_input_frames = 2;
+ ui_defocus_all();
+
+ if( fill ) {
+ ui_fill( rect, col_highlight );
+ rect_copy( rect, vg_ui.click_fader );
+ rect_copy( rect, vg_ui.click_fader_end );
+ vg_ui.click_fader_end[3] = 0;
+ ui_rect_center( rect, vg_ui.click_fader_end );
+ vg_ui.click_fade_opacity = 1.0f;
+ }
+
+ return k_ui_button_click;
+ }
+ else{
+ if( fill ) ui_fill( rect, col_highlight );
+ return k_ui_button_holding_inside;
+ }
+ }
+ else{
+ if( fill ) ui_fill( rect, col_base );
+ ui_outline( rect, 1, col_highlight, 0 );
+ return k_ui_button_holding_outside;
+ }
+ }
+ else{
+ if( fill ) ui_fill( rect, col_base );
+ return k_ui_button_none;
+ }
+ }
+ else{
+ if( hover ){
+ if( fill ) ui_fill( rect, col_hover );
+ return k_ui_button_hover;
+ }
+ else{
+ if( fill ) ui_fill( rect, col_base );
+ return k_ui_button_none;
+ }
+ }
+}
+
+enum ui_button_state ui_colourbutton_text(
+ ui_rect rect, const char *string, ui_px scale,
+ enum ui_scheme_colour colour ){
+ enum ui_button_state state = ui_colourbutton( rect, colour, 0, 0, 1 );
+ ui_rect t = { 0,0, ui_text_line_width( string )*scale, 14*scale };
+ ui_rect_center( rect, t );
+
+ u32 text_colour = ui_colourcont(colour);
+ if( state == k_ui_button_holding_inside )
+ text_colour = colour;
+
+ ui_text( t, string, scale, k_ui_align_left, text_colour );
+ return state;
+}
+
+enum ui_button_state ui_button_text( ui_rect rect,
+ const char *string, ui_px scale )
+{
+ return ui_colourbutton_text( rect, string, scale, k_ui_bg+4 );
+}
+
+enum ui_button_state ui_button( ui_rect inout_panel, const char *string )
+{
+ ui_rect rect;
+ ui_standard_widget( inout_panel, rect, 1 );
+ return ui_colourbutton_text( rect, string, 1, k_ui_bg+4 );
+}
+
+static void ui_enum_post(void);
+void ui_postrender(void)
+{
+ if( vg_ui.click_fade_opacity > 0.0f ){
+ float scale = vg_ui.click_fade_opacity;
+ scale = vg_maxf( 1.0f/255.0f, scale*scale );
+
+ vg_ui.click_fade_opacity -= vg.time_frame_delta * 3.8f;
+ u32 colour = (0x00ffffff & ui_colour(k_ui_fg))|0x7f000000;
+
+ v4f begin, end, dest;
+ for( int i=0; i<4; i++ ){
+ begin[i] = vg_ui.click_fader[i];
+ end[i] = vg_ui.click_fader_end[i]+1;
+ }
+
+ v4_lerp( end, begin, scale, dest );
+
+ ui_rect rect;
+ for( int i=0; i<4; i++ ){
+ rect[i] = dest[i];
+ }
+
+ ui_fill( rect, colour );
+ }
+
+ if( vg_ui.focused_control_type == k_ui_control_enum ){
+ ui_enum_post();
+ }
+ else if( vg_ui.focused_control_type == k_ui_control_modal ){
+ ui_rect screen = {0,0,vg.window_x,vg.window_y};
+ ui_fill( screen, 0xa0000000 );
+ ui_rect box = {0,0,400,200};
+
+ u32 colour = ui_colour(k_ui_fg),
+ type = vg_ui.modal.options & UI_MODAL_TYPE_BITS;
+ if ( type == 1 ) colour = ui_colour(k_ui_green);
+ else if( type == 2 ) colour = ui_colour(k_ui_red);
+ else if( type == 3 ) colour = ui_colour(k_ui_yellow);
+
+ ui_rect_center( screen, box );
+ ui_fill( box, ui_colour(k_ui_bg) );
+ ui_outline( box, -1, colour, 0 );
+
+ ui_rect message;
+ rect_copy( box, message );
+ message[3] = 100;
+ ui_rect_center( box, message );
+
+ ui_rect row0, row1, btn;
+ ui_split_ratio( message, k_ui_axis_h, 0.5f, 0, row0, row1 );
+ row0[0] += vg_ui.font->spacing;
+ ui_ntext( row0, vg_ui.modal.message, (box[2]/vg_ui.font->spacing)-2, 1,
+ k_ui_align_left, colour );
+
+ rect_copy( row1, btn );
+ btn[2] = 86;
+ btn[3] = 28;
+ ui_rect_center( row1, btn );
+
+ vg_ui.focused_control_type = k_ui_control_none; /* HACK */
+ if( ui_button_text( btn, "OK", 1 ) != 1 )
+ vg_ui.focused_control_hit = 1;
+ vg_ui.focused_control_type = k_ui_control_modal; /* HACK */
+ vg_ui.wants_mouse = 1;
+ }
+
+ ui_flush( k_ui_shader_colour, vg.window_x, vg.window_y );
+
+ if( !vg_ui.focused_control_hit ){
+ ui_defocus_all();
+ }
+
+ if( vg_ui.wants_mouse ){
+ SDL_SetWindowGrab( vg.window, SDL_FALSE );
+ SDL_SetRelativeMouseMode( SDL_FALSE );
+ }
+ else{
+ SDL_SetWindowGrab( vg.window, SDL_TRUE );
+ SDL_SetRelativeMouseMode( SDL_TRUE );
+ }
+
+ SDL_SetCursor( vg_ui.cursor_map[ vg_ui.cursor ] );
+ SDL_ShowCursor(1);
+}
+
+/*
+ * checkbox
+ * -----------------------------------------------------------------------------
+ */
+
+int ui_checkbox( ui_rect inout_panel, const char *str_label, i32 *data )
+{
+ ui_rect rect, label, box;
+ ui_standard_widget( inout_panel, rect, 1 );
+
+ ui_split( rect, k_ui_axis_v, -rect[3], 0, label, box );
+ ui_text( label, str_label, k_ui_scale, k_ui_align_middle_left, 0 );
+
+ int changed = ui_colourbutton( box, k_ui_bg, 0, 0, 1 )==1;
+ if( changed )
+ *data = (*data) ^ 0x1;
+
+ if( *data ){
+ ui_rect_pad( box, (ui_px[2]){4,4} );
+ ui_fill( box, ui_colour( k_ui_orange ) );
+ }
+
+ return changed;
+}
+
+/*
+ * Dropdown / Enum
+ * -----------------------------------------------------------------------------
+ */
+
+/*
+ * unfortunately no return value since we only find out that event in the
+ * postrender step.
+ */
+void ui_enum( ui_rect inout_panel, const char *str_label,
+ struct ui_enum_opt *options, u32 len, i32 *value )
+{
+ ui_rect rect, label, box;
+ ui_standard_widget( inout_panel, rect, 1 );
+ ui_label( rect, str_label, k_ui_scale, 0, box );
+
+ const char *display = "OUT OF RANGE";
+ int valid = 0;
+ for( u32 i=0; i<len; i ++ ){
+ if( *value == options[i].value ){
+ display = options[i].alias;
+ valid = 1;
+ break;
+ }
+ }
+
+ if( ui_button_text( box, display, k_ui_scale ) == 1 ){
+ vg_ui.focused_control_type = k_ui_control_enum;
+ vg_ui.ptr_enum = value;
+ vg_ui._enum.option_count = len;
+ vg_ui._enum.options = options;
+ rect_copy( box, vg_ui._enum.rect );
+ }
+
+ if( !valid )
+ ui_outline( box, 1, ui_colour(k_ui_red), 0 );
+}
+
+static void ui_enum_post(void){
+ ui_rect drawer;
+ rect_copy( vg_ui._enum.rect, drawer );
+ drawer[3] *= vg_ui._enum.option_count;
+
+ int close = 0;
+ int clickany= ui_click_up(UI_MOUSE_LEFT|UI_MOUSE_RIGHT|UI_MOUSE_MIDDLE),
+ hover = ui_inside_rect( drawer, vg_ui.mouse );
+
+ if( clickany && !hover ){
+ return;
+ }
+
+ /* HACK */
+ vg_ui.focused_control_type = k_ui_control_none;
+ i32 *value = vg_ui.ptr_enum;
+
+ for( u32 i=0; i<vg_ui._enum.option_count; i++ ){
+ ui_rect button;
+ ui_split( drawer, k_ui_axis_h, vg_ui._enum.rect[3], 0, button,drawer );
+
+ enum ui_scheme_colour colour = k_ui_bg+3;
+ if( vg_ui._enum.options[i].value == *value )
+ colour = k_ui_orange;
+
+ if( ui_colourbutton_text( button, vg_ui._enum.options[i].alias,
+ k_ui_scale, colour ) == 1 ){
+ *value = vg_ui._enum.options[i].value;
+ close = 1;
+ }
+ }
+
+ /* HACK */
+ vg_ui.focused_control_type = k_ui_control_enum;
+
+ if( !close )
+ vg_ui.focused_control_hit = 1;
+}
+
+/*
+ * Slider
+ * -----------------------------------------------------------------------------
+ */
+
+static enum ui_button_state _ui_slider(
+ ui_rect box, f32 min, f32 max, f32 *value, const char *format )
+{
+ f32 t;
+
+ enum ui_button_state
+ mask_using =
+ k_ui_button_holding_inside |
+ k_ui_button_holding_outside |
+ k_ui_button_click,
+ mask_brighter =
+ mask_using | k_ui_button_hover,
+ state = ui_colourbutton( box, k_ui_bg, k_ui_bg+2, k_ui_bg+3, 1 );
+
+ if( state & mask_using ){
+ t = vg_clampf( (f32)(vg_ui.mouse[0] - box[0]) / (f32)( box[2] ),
+ 0.0f, 1.0f );
+ *value = vg_lerpf( min, max, t );
+ }
+ else
+ t = vg_clampf( (*value - min) / (max-min), 0.0f, 1.0f );
+
+ ui_rect line = { box[0], box[1], t * (f32)box[2], box[3] };
+ ui_fill( line, ui_colour(state&mask_brighter? k_ui_bg+4: k_ui_bg+2) );
+
+ ui_outline( box, 1, ui_colour(state? k_ui_fg+3: k_ui_bg+3), 0 );
+
+ /* TODO: replace this one day with our own function */
+ char buf[32];
+ snprintf( buf, sizeof(buf), format? format: "%.2f", *value );
+ ui_text( box, buf, 1, k_ui_align_middle_center, 0 );
+
+ return state;
+}
+
+void ui_slider( ui_rect inout_panel, const char *str_label,
+ f32 min, f32 max, f32 *value, const char *format )
+{
+ ui_rect rect, label, box;
+ ui_standard_widget( inout_panel, rect, 1 );
+ ui_label( rect, str_label, k_ui_scale, 0, box );
+ _ui_slider( box, min, max, value, format );
+}
+
+/*
+ * Colour picker
+ * -----------------------------------------------------------------------------
+ */
+
+void ui_colourpicker( ui_rect inout_panel, const char *str_label, v4f value )
+{
+ ui_rect widget, left, right;
+ ui_standard_widget( inout_panel, widget, 8 );
+ ui_split_ratio( widget, k_ui_axis_v, 0.5f, 8, left, right );
+
+ ui_rect sliders[4];
+ ui_split_ratio( right, k_ui_axis_h, 0.5f, 2, sliders[0], sliders[2] );
+ ui_split_ratio( sliders[0], k_ui_axis_h, 0.5f, 2, sliders[0], sliders[1] );
+ ui_split_ratio( sliders[2], k_ui_axis_h, 0.5f, 2, sliders[2], sliders[3] );
+
+ v4f hsv;
+ vg_rgb_hsv( value, hsv );
+ hsv[3] = value[3];
+
+ enum ui_button_state modified = 0x00;
+
+ for( u32 i=0; i<4; i ++ ){
+ modified |= _ui_slider( sliders[i], 0.0f, 1.0f, hsv+i,
+ (const char *[]){ "hue %.2f",
+ "sat %.2f",
+ "lum %.2f",
+ "alpha %.2f" }[i] );
+ }
+
+ ui_rect preview, square;
+ ui_split_ratio( left, k_ui_axis_v, 0.8f, 8, square, preview );
+
+ u32 state = ui_colourbutton( square, 0, 0, 0, 0 );
+ modified |= state;
+
+ enum ui_button_state
+ mask_using =
+ k_ui_button_holding_inside |
+ k_ui_button_holding_outside |
+ k_ui_button_click;
+
+ if( state & mask_using ){
+ for( u32 i=0; i<2; i ++ ){
+ hsv[1+i] = vg_clampf(
+ (f32)(vg_ui.mouse[i] - square[i]) / (f32)(square[2+i]),
+ 0.0f, 1.0f );
+ }
+
+ hsv[2] = 1.0f-hsv[2];
+ }
+
+ if( modified & (k_ui_button_click|k_ui_button_holding_inside|
+ k_ui_button_holding_outside) ){
+ vg_hsv_rgb( hsv, value );
+ value[3] = hsv[3];
+ }
+
+ ui_outline( square, 1, ui_colour( state? k_ui_fg+3: k_ui_bg+3 ), 0 );
+
+ /* preview colour */
+ v4f colour;
+ vg_hsv_rgb( hsv, colour );
+ colour[3] = 1.0f;
+ ui_fill( preview, v4f_u32_colour( colour ) );
+
+ /* Draw hsv shader thingy */
+ ui_flush( k_ui_shader_colour, vg.window_x, vg.window_y );
+ ui_fill_rect( square, 0xffffffff, (ui_px[4]){ 0,256,256,0 } );
+ vg_ui.hue = hsv[0];
+ ui_flush( k_ui_shader_hsv, vg.window_x, vg.window_y );
+
+ ui_rect marker = { square[0] + hsv[1] * (f32)square[2] - 4,
+ square[1] + (1.0f-hsv[2]) * (f32)square[3] - 4,
+ 8, 8 },
+ lx = { square[0],
+ square[1] + (1.0f-hsv[2]) * (f32)square[3],
+ square[2], 1 },
+ ly = { square[0] + hsv[1] * (f32)square[2],
+ square[1],
+ 1, square[3] };
+
+ ui_fill( marker, ui_colour( k_ui_fg ) );
+ ui_fill( lx, ui_colour( k_ui_fg ) );
+ ui_fill( ly, ui_colour( k_ui_fg ) );
+}
+
+/*
+ * Textbox chaos
+ * -----------------------------------------------------------------------------
+ */
+
+static void _ui_textbox_make_selection( int *start, int *end ){
+ *start = VG_MIN( vg_ui.textbox.cursor_pos, vg_ui.textbox.cursor_user );
+ *end = VG_MAX( vg_ui.textbox.cursor_pos, vg_ui.textbox.cursor_user );
+}
+
+void _ui_textbox_move_cursor( int *cursor0, int *cursor1,
+ int dir, int snap_together )
+{
+ *cursor0 = VG_MAX( 0, vg_ui.textbox.cursor_user + dir );
+ *cursor0 =
+ VG_MIN(
+ VG_MIN( vg_ui.textbox.len-1, strlen( vg_ui.textbuf )),
+ *cursor0 );
+
+ if( snap_together )
+ *cursor1 = *cursor0;
+}
+
+static int _ui_textbox_makeroom( int datastart, int length ){
+ int move_to = VG_MIN( datastart+length, vg_ui.textbox.len-1 );
+ int move_amount = strlen( vg_ui.textbuf )-datastart;
+ int move_end = VG_MIN( move_to+move_amount, vg_ui.textbox.len-1 );
+ move_amount = move_end-move_to;
+
+ if( move_amount )
+ memmove( &vg_ui.textbuf[ move_to ],
+ &vg_ui.textbuf[ datastart ],
+ move_end-move_to );
+
+ vg_ui.textbuf[ move_end ] = '\0';
+
+ return VG_MIN( length, vg_ui.textbox.len-datastart-1 );
+}
+
+int _ui_textbox_delete_char( int direction )
+{
+ int start, end;
+ _ui_textbox_make_selection( &start, &end );
+
+ /* There is no selection */
+ if( !(end-start) ){
+ if( direction == 1 ) end = VG_MIN( end+1, strlen( vg_ui.textbuf ) );
+ else if( direction == -1 ) start = VG_MAX( start-1, 0 );
+ }
+
+ /* Still no selction, no need to do anything */
+ if( !(end-start) )
+ return start;
+
+ /* Copy the end->terminator to start */
+ int remaining_length = strlen( vg_ui.textbuf )+1-end;
+ memmove( &vg_ui.textbuf[ start ],
+ &vg_ui.textbuf[ end ],
+ remaining_length );
+ return start;
+}
+
+static void _ui_textbox_to_clipboard(void){
+ int start, end;
+ _ui_textbox_make_selection( &start, &end );
+ char buffer[512];
+
+ if( end-start ){
+ memcpy( buffer, &vg_ui.textbuf[ start ], end-start );
+ buffer[ end-start ] = 0x00;
+ SDL_SetClipboardText( buffer );
+ }
+}
+
+static void _ui_textbox_change_callback(void){
+ if( vg_ui.textbox.callbacks.change ){
+ vg_ui.textbox.callbacks.change( vg_ui.textbuf, vg_ui.textbox.len );
+
+ /* we gave permission to modify the buffer in this callback so.. */
+ int len = strlen( vg_ui.textbuf );
+ vg_ui.textbox.cursor_user = VG_MIN( vg_ui.textbox.cursor_user, len );
+ vg_ui.textbox.cursor_pos = VG_MIN( vg_ui.textbox.cursor_pos, len );
+ }
+}
+
+void ui_start_modal( const char *message, u32 options );
+static void _ui_textbox_clipboard_paste(void){
+ if( !SDL_HasClipboardText() )
+ return;
+
+ char *text = SDL_GetClipboardText();
+
+ if( !text )
+ return;
+
+ int datastart = _ui_textbox_delete_char( 0 );
+ int length = strlen( text );
+
+ if( (vg_ui.textbox.len - strlen(vg_ui.textbuf)) < length ){
+ ui_start_modal( "Clipboard content exceeds buffer size.", UI_MODAL_BAD );
+ return;
+ }
+
+ int cpylength = _ui_textbox_makeroom( datastart, length );
+
+ memcpy( vg_ui.textbuf + datastart, text, cpylength);
+ _ui_textbox_move_cursor( &vg_ui.textbox.cursor_user,
+ &vg_ui.textbox.cursor_pos, cpylength, 1 );
+ SDL_free( text );
+ _ui_textbox_change_callback();
+}
+
+void _ui_textbox_put_char( char c )
+{
+ vg_ui.textbox.cursor_user = _ui_textbox_delete_char(0);
+ if( (vg_ui.textbox.len - strlen(vg_ui.textbuf)) <= 1 ) return;
+
+ if( _ui_textbox_makeroom( vg_ui.textbox.cursor_user, 1 ) )
+ vg_ui.textbuf[ vg_ui.textbox.cursor_user ] = c;
+
+ _ui_textbox_move_cursor( &vg_ui.textbox.cursor_user,
+ &vg_ui.textbox.cursor_pos, 1, 1 );
+}
+
+/* Receed secondary cursor */
+void _ui_textbox_left_select(void)
+{
+ _ui_textbox_move_cursor( &vg_ui.textbox.cursor_user, NULL, -1, 0 );
+}
+
+/* Match and receed both cursors */
+void _ui_textbox_left(void)
+{
+ int cursor_diff = vg_ui.textbox.cursor_pos - vg_ui.textbox.cursor_user? 0: 1;
+
+ _ui_textbox_move_cursor( &vg_ui.textbox.cursor_user,
+ &vg_ui.textbox.cursor_pos, -cursor_diff, 1 );
+}
+
+void _ui_textbox_up(void)
+{
+ if( vg_ui.textbox.flags & UI_TEXTBOX_MULTILINE ){
+ int line_begin = vg_ui.textbox.cursor_user;
+
+ while( line_begin ){
+ if( vg_ui.textbuf[ line_begin-1 ] == '\n' ){
+ break;
+ }
+
+ line_begin --;
+ }
+
+ if( line_begin ){
+ int line_above_begin = line_begin-1;
+
+ while( line_above_begin ){
+ if( vg_ui.textbuf[ line_above_begin-1 ] == '\n' ){
+ break;
+ }
+
+ line_above_begin --;
+ }
+
+ int offset = vg_ui.textbox.cursor_user - line_begin,
+ line_length_above = line_begin - line_above_begin -1;
+
+ offset = VG_MIN( line_length_above, offset );
+
+ vg_ui.textbox.cursor_user = line_above_begin+offset;
+ vg_ui.textbox.cursor_pos = line_above_begin+offset;
+ }
+ else{
+ vg_ui.textbox.cursor_user = line_begin;
+ vg_ui.textbox.cursor_pos = line_begin;
+ }
+ }
+ else{
+ if( vg_ui.textbox.callbacks.up ){
+ vg_ui.textbox.callbacks.up( vg_ui.textbuf, vg_ui.textbox.len );
+ }
+ }
+}
+
+void _ui_textbox_down(void)
+{
+ if( vg_ui.textbox.flags & UI_TEXTBOX_MULTILINE ){
+ int line_begin = vg_ui.textbox.cursor_user;
+
+ while( line_begin ){
+ if( vg_ui.textbuf[ line_begin-1 ] == '\n' ){
+ break;
+ }
+
+ line_begin --;
+ }
+
+ int line_below_begin = vg_ui.textbox.cursor_user;
+
+ while(1){
+ if( vg_ui.textbuf[ line_below_begin ] == '\0' ){
+ vg_ui.textbox.cursor_user = line_below_begin;
+ vg_ui.textbox.cursor_pos = line_below_begin;
+ return;
+ }
+
+ if( vg_ui.textbuf[ line_below_begin ] == '\n' ){
+ line_below_begin ++;
+ break;
+ }
+
+ line_below_begin ++;
+ }
+
+ int line_below_end = line_below_begin;
+ while(1){
+ if( vg_ui.textbuf[ line_below_end ] == '\0' ||
+ vg_ui.textbuf[ line_below_end ] == '\n' ){
+ line_below_end ++;
+ break;
+ }
+ line_below_end ++;
+ }
+
+ int offset = vg_ui.textbox.cursor_user - line_begin,
+ line_length_below = line_below_end - line_below_begin -1;
+
+ offset = VG_MIN( line_length_below, offset );
+
+ vg_ui.textbox.cursor_user = line_below_begin+offset;
+ vg_ui.textbox.cursor_pos = line_below_begin+offset;
+ }
+ else{
+ if( vg_ui.textbox.callbacks.down ){
+ vg_ui.textbox.callbacks.down( vg_ui.textbuf, vg_ui.textbox.len );
+ }
+ }
+}
+
+void _ui_textbox_right_select(void)
+{
+ _ui_textbox_move_cursor( &vg_ui.textbox.cursor_user, NULL, 1, 0 );
+}
+
+void _ui_textbox_right(void)
+{
+ int cursor_diff = vg_ui.textbox.cursor_pos - vg_ui.textbox.cursor_user? 0: 1;
+
+ _ui_textbox_move_cursor( &vg_ui.textbox.cursor_user,
+ &vg_ui.textbox.cursor_pos, +cursor_diff, 1 );
+}
+
+void _ui_textbox_backspace(void)
+{
+ if( vg_ui.focused_control_type == k_ui_control_textbox ){
+ vg_ui.textbox.cursor_user = _ui_textbox_delete_char( -1 );
+ vg_ui.textbox.cursor_pos = vg_ui.textbox.cursor_user;
+ _ui_textbox_change_callback();
+ }
+}
+
+void _ui_textbox_delete(void)
+{
+ if( vg_ui.focused_control_type == k_ui_control_textbox ){
+ vg_ui.textbox.cursor_user = _ui_textbox_delete_char( 1 );
+ vg_ui.textbox.cursor_pos = vg_ui.textbox.cursor_user;
+ _ui_textbox_change_callback();
+ }
+}
+
+void _ui_textbox_home_select(void)
+{
+ i32 start = vg_ui.textbox.cursor_user;
+
+ if( vg_ui.textbox.flags & UI_TEXTBOX_MULTILINE ){
+ while( start ){
+ if( vg_ui.textbuf[start-1] == '\n' )
+ break;
+ else
+ start --;
+ }
+ }
+ else
+ start = 0;
+
+ vg_ui.textbox.cursor_user = start;
+}
+
+void _ui_textbox_home(void)
+{
+ _ui_textbox_home_select();
+ vg_ui.textbox.cursor_pos = vg_ui.textbox.cursor_user;
+}
+
+void _ui_textbox_end_select(void)
+{
+ i32 end = vg_ui.textbox.cursor_user;
+
+ if( vg_ui.textbox.flags & UI_TEXTBOX_MULTILINE ){
+ while( vg_ui.textbuf[end] ){
+ if( vg_ui.textbuf[end] == '\n' )
+ break;
+ else
+ end ++;
+ }
+ }
+ else
+ end = VG_MIN( vg_ui.textbox.len-1, strlen(vg_ui.textbuf) );
+
+ vg_ui.textbox.cursor_user = end;
+}
+
+void _ui_textbox_end(void)
+{
+ _ui_textbox_end_select();
+ vg_ui.textbox.cursor_pos = vg_ui.textbox.cursor_user;
+}
+
+void _ui_textbox_select_all(void)
+{
+ _ui_textbox_move_cursor( &vg_ui.textbox.cursor_user, NULL, 10000, 0);
+ _ui_textbox_move_cursor( &vg_ui.textbox.cursor_pos, NULL, -10000, 0);
+}
+
+void _ui_textbox_cut(void)
+{
+ _ui_textbox_to_clipboard();
+ vg_ui.textbox.cursor_user = _ui_textbox_delete_char(0);
+ vg_ui.textbox.cursor_pos = vg_ui.textbox.cursor_user;
+ _ui_textbox_change_callback();
+}
+
+void _ui_textbox_enter(void)
+{
+ if( vg_ui.focused_control_type == k_ui_control_textbox ){
+ vg_ui.ignore_input_frames = 2;
+
+ if( vg_ui.textbox.callbacks.enter )
+ vg_ui.textbox.callbacks.enter( vg_ui.textbuf, vg_ui.textbox.len );
+
+ if( vg_ui.focused_control_type != k_ui_control_textbox ) return;
+
+ if( vg_ui.textbox.flags & UI_TEXTBOX_MULTILINE ){
+ _ui_textbox_put_char( '\n' );
+ _ui_textbox_change_callback();
+ }
+ else{
+ if( !(vg_ui.textbox.flags & UI_TEXTBOX_AUTOFOCUS ) )
+ ui_defocus_all();
+ }
+ }
+}
+
+/*
+ * based on a visual character coordinate relative to the anchor of the textbox,
+ * this works out the linear place in the buffer that coordinate maps to
+ *
+ * input coordinates go in co[0], co[1], and the result index is in co[2]
+ */
+static void _ui_textbox_calc_index_from_grid( int co[3], int wrap_length ){
+ int i[3] = {0,0,0};
+
+ char c;
+ while( (c = vg_ui.textbuf[i[2]]) ){
+ if( i[1]==co[1] && i[0]>=co[0] ) break;
+
+ if( i[0] >= wrap_length ){
+ i[1] ++;
+ i[0] = 0;
+ }
+
+ if( c >= 32 && c <= 126 ){
+ i[0] ++;
+ i[2] ++;
+ }
+ else if( c == '\n' ){
+ i[1] ++;
+
+ if( i[1] > co[1] ) break;
+
+ i[2] ++;
+ i[0] = 0;
+ }
+ else i[2] ++;
+ }
+
+ co[0] = i[0];
+ co[1] = i[1];
+ co[2] = i[2];
+}
+
+/*
+ * based on the index specied in co[2], work out the visual character
+ * coordinates and store them in co[0], co[1]
+ */
+static void _ui_textbox_index_calc_coords( int co[3], int wrap_length ){
+ co[0] = 0;
+ co[1] = 0;
+
+ char c;
+ int i=0;
+
+ while( (c = vg_ui.textbuf[i ++]) ){
+ if( i > co[2] ) break;
+ if( co[0] >= wrap_length ){
+ co[1] ++;
+ co[0] = 0;
+ }
+ if( c >= 32 && c <= 126 ) co[0] ++;
+ else if( c == '\n' ){
+ co[1] ++;
+ co[0] = 0;
+ }
+ }
+}
+
+/*
+ * calculate the number of characters remaining until either:
+ * - the wrap_length limit is hit
+ * - end of the line/string
+ *
+ * index must be fully populated with visual X/Y, and linear index
+ */
+static int _ui_textbox_run_remaining( int index[3], int wrap_length ){
+ int i=0, printed_chars=0;
+ char c;
+ while( (c = vg_ui.textbuf[index[2] + (i ++)]) ){
+ if( index[0]+i >= wrap_length ) break;
+ if( c >= 32 && c <= 126 ) printed_chars ++;
+ else if( c == '\n' ) break;
+ }
+
+ return printed_chars+1;
+}
+
+int ui_textbox( ui_rect inout_panel, const char *label,
+ char *buf, u32 len, u32 lines, u32 flags,
+ struct ui_textbox_callbacks *callbacks )
+{
+ if( lines > 1 ) flags |= UI_TEXTBOX_MULTILINE;
+
+ ui_rect rect;
+ ui_standard_widget( inout_panel, rect, lines );
+
+ if( label )
+ ui_label( rect, label, 1, 0, rect );
+
+ int clickup= ui_click_up(UI_MOUSE_LEFT),
+ clickdown = ui_click_down(UI_MOUSE_LEFT),
+ click = ui_clicking(UI_MOUSE_LEFT) | clickup,
+ target = ui_inside_rect( rect, vg_ui.mouse_click ) && click,
+ hover = ui_inside_rect( rect, vg_ui.mouse );
+
+ /* allow instant transitions from textbox->textbox */
+ if( (vg_ui.focused_control_type != k_ui_control_none) &&
+ (vg_ui.focused_control_type != k_ui_control_textbox) ){
+ clickup = 0;
+ clickdown = 0;
+ click = 0;
+ target = 0;
+ hover = 0;
+ flags &= ~UI_TEXTBOX_AUTOFOCUS;
+ }
+
+ u32 col_base = ui_colour( k_ui_bg ),
+ col_highlight = ui_colour( k_ui_fg ),
+ col_cursor = (0x00ffffff & ui_colour(k_ui_fg))|0x7f000000;
+
+ ui_px border = -1;
+
+ ui_rect text_rect;
+ rect_copy( rect, text_rect );
+
+ if( flags & UI_TEXTBOX_MULTILINE ) text_rect[3] = rect[3]-16;
+ else text_rect[3] = vg_ui.font->line_height;
+
+ text_rect[2] -= 16;
+ ui_rect_center( rect, text_rect );
+
+ ui_px wrap_length = 1024;
+
+ if( flags & UI_TEXTBOX_WRAP )
+ wrap_length = text_rect[2] / vg_ui.font->spacing;
+
+ if( hover ){
+ vg_ui.cursor = k_ui_cursor_ibeam;
+ }
+
+ if( vg_ui.focused_control_id == buf ){
+ ui_fill( rect, col_base );
+ ui_ntext( text_rect, buf, wrap_length, 1, k_ui_align_left, 0 );
+
+ if( !(flags & UI_TEXTBOX_AUTOFOCUS) && ((clickup||clickdown) && !target)){
+ ui_defocus_all();
+ }
+ else{
+ vg_ui.focused_control_hit = 1;
+ if( click && target ){
+ int p0[3] ={
+ (vg_ui.mouse_click[0] - text_rect[0]) / vg_ui.font->spacing,
+ (vg_ui.mouse_click[1] - text_rect[1]) / vg_ui.font->line_height,
+ -1
+ },
+ p1[3] = {
+ (vg_ui.mouse[0] - text_rect[0]) / vg_ui.font->spacing,
+ (vg_ui.mouse[1] - text_rect[1]) / vg_ui.font->line_height,
+ -1
+ };
+
+ if( flags & UI_TEXTBOX_MULTILINE ){
+ _ui_textbox_calc_index_from_grid( p0, wrap_length );
+ _ui_textbox_calc_index_from_grid( p1, wrap_length );
+
+ vg_ui.textbox.cursor_pos = p0[2];
+ vg_ui.textbox.cursor_user = p1[2];
+ }
+ else{
+ int max = strlen( buf );
+ vg_ui.textbox.cursor_pos = VG_MAX( 0, VG_MIN( max, p0[0] )),
+ vg_ui.textbox.cursor_user = VG_MAX( 0, VG_MIN( max, p1[0] ));
+ }
+ }
+
+ ui_outline( rect, -2, vg_ui.scheme[ k_ui_orange ], 0 );
+
+ ui_rect cursor;
+
+ int c0 = vg_ui.textbox.cursor_pos,
+ c1 = vg_ui.textbox.cursor_user,
+ start = VG_MIN( c0, c1 ),
+ end = VG_MAX( c0, c1 ),
+ chars = end-start;
+
+ if( flags & (UI_TEXTBOX_WRAP|UI_TEXTBOX_MULTILINE) ){
+ int pos[3], remaining = chars;
+
+ pos[2] = start;
+ _ui_textbox_index_calc_coords( pos, wrap_length );
+
+ if( start==end ){
+ cursor[0] = text_rect[0] + pos[0]*vg_ui.font->spacing-1;
+ cursor[1] = text_rect[1] + pos[1]*14;
+ cursor[2] = 2;
+ cursor[3] = 13;
+ ui_fill( cursor, col_cursor );
+ rect_copy( cursor, vg_ui.click_fader_end );
+ }
+ else{
+ while( remaining ){
+ int run = _ui_textbox_run_remaining( pos, wrap_length );
+ run = VG_MIN( run, remaining );
+
+ cursor[0] = text_rect[0] + pos[0]*vg_ui.font->spacing-1;
+ cursor[1] = text_rect[1] + pos[1]*14;
+ cursor[2] = (float)(run)*(float)vg_ui.font->spacing;
+ cursor[3] = 13;
+
+ ui_fill( cursor, col_cursor );
+
+ remaining -= run;
+ pos[0] = 0;
+ pos[1] ++;
+ pos[2] += run;
+ }
+ rect_copy( cursor, vg_ui.click_fader_end );
+ }
+ }
+ else{
+ cursor[0] = text_rect[0] + start*vg_ui.font->spacing-1;
+ cursor[1] = text_rect[1];
+ cursor[3] = 13;
+
+ if( start==end ){
+ cursor[2] = 2;
+ }
+ else{
+ cursor[2] = (float)(chars)*(float)vg_ui.font->spacing;
+ }
+
+ if( (vg_ui.click_fade_opacity<=0.0f) &&
+ ui_clip( rect, cursor, cursor ) ){
+ ui_fill( cursor, col_cursor );
+ }
+
+ rect_copy( cursor, vg_ui.click_fader_end );
+ }
+ }
+
+ return 0;
+ }
+
+ if( click || (flags & UI_TEXTBOX_AUTOFOCUS) ){
+ if( (target && hover) || (flags & UI_TEXTBOX_AUTOFOCUS) ){
+ ui_defocus_all();
+
+ ui_fill( rect, col_highlight );
+ vg_ui.ignore_input_frames = 2;
+ rect_copy( rect, vg_ui.click_fader );
+ rect_copy( rect, vg_ui.click_fader_end );
+
+ vg_ui.click_fade_opacity = 1.0f;
+ vg_ui.textbuf = buf;
+ vg_ui.focused_control_hit = 1;
+ vg_ui.focused_control_type = k_ui_control_textbox;
+ vg_ui.textbox.len = len;
+ vg_ui.textbox.flags = flags;
+ vg_ui.textbox.cursor_pos = 0;
+ vg_ui.textbox.cursor_user = 0;
+
+ if( callbacks ){
+ vg_ui.textbox.callbacks = *callbacks;
+ }
+ else{
+ vg_ui.textbox.callbacks.change = NULL;
+ vg_ui.textbox.callbacks.down = NULL;
+ vg_ui.textbox.callbacks.up = NULL;
+ vg_ui.textbox.callbacks.enter = NULL;
+ }
+
+ SDL_StartTextInput();
+ }
+ }
+
+ ui_fill( rect, col_base );
+
+ if( hover ){
+ ui_outline( rect, -1, col_highlight, 0 );
+ }
+
+ ui_ntext( text_rect, buf, wrap_length, 1, k_ui_align_left, 0 );
+ return 0;
+}
+
+/*
+ * Tabs
+ * -----------------------------------------------------------------------------
+ */
+
+void ui_tabs( ui_rect inout_panel, ui_rect out_content_panel,
+ const char **titles, u32 count, i32 *page )
+{
+ ui_rect bar;
+ ui_standard_widget( inout_panel, bar, 1 );
+
+ i32 cur_page = *page;
+
+ f32 width = (f32)inout_panel[2] / (f32)count;
+
+ ui_px h = (inout_panel[1] + inout_panel[3]) - (bar[1]+bar[3]);
+ inout_panel[1] = bar[1]+bar[3];
+ inout_panel[3] = h;
+
+ ui_fill( inout_panel, ui_colour( k_ui_bg+2 ) );
+ ui_outline( inout_panel, 1, ui_colour( k_ui_bg+5 ), 0 );
+
+ rect_copy( inout_panel, out_content_panel );
+ ui_rect_pad( out_content_panel, (ui_px[2]){ k_ui_padding, k_ui_padding } );
+
+ /* place buttons */
+ for( i32 i=0; i<count; i++ ){
+ ui_rect button = {
+ bar[0] + ((f32)i*width),
+ bar[1],
+ width,
+ bar[3]-1
+ };
+
+ enum ui_scheme_colour colour = k_ui_bg+4;
+ if( i == cur_page ){
+ colour = k_ui_bg+2;
+ ui_outline( button, 1, ui_colour( k_ui_bg+5 ),
+ UI_TOP|UI_LEFT|UI_RIGHT );
+ button[3] ++;
+ }
+
+ if( ui_colourbutton_text( button, titles[i], 1, colour ) == 1 )
+ *page = i;
+ }
+}
+
+/*
+ * Modal UI
+ * -----------------------------------------------------------------------------
+ */
+void ui_start_modal( const char *message, u32 options )
+{
+ vg_ui.focused_control_type = k_ui_control_modal;
+ vg_ui.modal.message = message;
+ vg_ui.modal.callbacks.close = NULL;
+ vg_ui.modal.options = options;
+
+ u32 type = options & UI_MODAL_TYPE_BITS;
+ if( type == UI_MODAL_OK ) vg_info( message );
+ else if( type == UI_MODAL_WARN ) vg_warn( message );
+ else if( type == UI_MODAL_GOOD ) vg_success( message );
+ else if( type == UI_MODAL_BAD ) vg_error( message );
+}
+
+/*
+ * Input handling
+ * -----------------------------------------------------------------------------
+ */
+
+/*
+ * Handles binds
+ */
+void ui_proc_key( SDL_Keysym ev )
+{
+ if( vg_ui.focused_control_type != k_ui_control_textbox ){
+ return;
+ }
+
+ struct textbox_mapping{
+ u16 mod;
+ SDL_Keycode key;
+
+ void (*handler)(void);
+ }
+ mappings[] =
+ {
+ { 0, SDLK_LEFT, _ui_textbox_left },
+ { KMOD_SHIFT, SDLK_LEFT, _ui_textbox_left_select },
+ { 0, SDLK_RIGHT, _ui_textbox_right },
+ { KMOD_SHIFT, SDLK_RIGHT, _ui_textbox_right_select },
+ { 0, SDLK_DOWN, _ui_textbox_down },
+ { 0, SDLK_UP, _ui_textbox_up },
+ { 0, SDLK_BACKSPACE, _ui_textbox_backspace },
+ { KMOD_SHIFT, SDLK_BACKSPACE, _ui_textbox_backspace },
+ { KMOD_CTRL, SDLK_BACKSPACE, _ui_textbox_backspace },
+ { 0, SDLK_DELETE, _ui_textbox_delete },
+ { 0, SDLK_HOME, _ui_textbox_home },
+ { KMOD_SHIFT, SDLK_HOME, _ui_textbox_home_select },
+ { 0, SDLK_END, _ui_textbox_end },
+ { KMOD_SHIFT, SDLK_END, _ui_textbox_end_select },
+ { KMOD_CTRL, SDLK_a, _ui_textbox_select_all },
+ { KMOD_CTRL, SDLK_c, _ui_textbox_to_clipboard },
+ { KMOD_CTRL, SDLK_x, _ui_textbox_cut },
+ { KMOD_CTRL, SDLK_v, _ui_textbox_clipboard_paste },
+ { 0, SDLK_RETURN, _ui_textbox_enter },
+ { 0, SDLK_ESCAPE, ui_defocus_all },
+ };
+
+ SDL_Keymod mod = 0;
+
+ if( ev.mod & KMOD_SHIFT )
+ mod |= KMOD_SHIFT;
+
+ if( ev.mod & KMOD_CTRL )
+ mod |= KMOD_CTRL;
+
+ if( ev.mod & KMOD_ALT )
+ mod |= KMOD_ALT;
+
+ for( int i=0; i<vg_list_size( mappings ); i++ ){
+ struct textbox_mapping *mapping = &mappings[i];
+
+ if( mapping->key == ev.sym ){
+ if( mapping->mod == 0 ){
+ if( mod == 0 ){
+ mapping->handler();
+ return;
+ }
+ }
+ else if( (mod & mapping->mod) == mapping->mod ){
+ mapping->handler();
+ return;
+ }
+ }
+ }
+}
+
+/*
+ * Callback for text entry mode
+ */
+void ui_proc_utf8( const char *text )
+{
+ if( vg_ui.focused_control_type == k_ui_control_textbox ){
+ const char *ptr = text;
+
+ while( *ptr ){
+ if( *ptr != '`' ) _ui_textbox_put_char( *ptr );
+ ptr ++;
+ }
+
+ _ui_textbox_change_callback();
+ }
+}
+
+/*
+ * Development utils
+ * -----------------------------------------------------------------------------
+ */
+
+void ui_dev_colourview(void)
+{
+ ui_rect window = {vg.window_x-256,0,256,vg.window_y}, swatch;
+
+ const char *names[vg_list_size(vg_ui.scheme)] = {
+ [k_ui_bg] = "k_ui_bg", "k_ui_bg+1", "k_ui_bg+2", "k_ui_bg+3",
+ "k_ui_bg+4", "k_ui_bg+5", "k_ui_bg+6", "k_ui_bg+7",
+
+ [k_ui_fg] = "k_ui_fg", "k_ui_fg+1", "k_ui_fg+2", "k_ui_fg+3",
+ "k_ui_fg+4", "k_ui_fg+5", "k_ui_fg+6", "k_ui_fg+7",
+
+ [k_ui_red] = "k_ui_red", "k_ui_orange", "k_ui_yellow", "k_ui_green",
+ "k_ui_aqua", "k_ui_blue", "k_ui_purple", "k_ui_gray",
+ "k_ui_red+8","k_ui_orange+8","k_ui_yellow+8","k_ui_green+8",
+ "k_ui_aqua+8","k_ui_blue+8","k_ui_purple+8","k_ui_gray+8" };
+
+ ui_rect col[2];
+ ui_split_ratio( window, k_ui_axis_v, 0.5f, 0, col[0], col[1] );
+
+ for( int i=0; i<vg_list_size(vg_ui.scheme); i++ ){
+ int which = (i/8)%2;
+
+ ui_split( col[which], k_ui_axis_h, 24, 0, swatch, col[which] );
+ ui_fill( swatch, ui_colour(i) );
+
+ if( names[i] )
+ ui_text(swatch, names[i], 1, k_ui_align_middle_left, ui_colourcont(i));
+ }
+}
projects / vg.git / blobdiff