+/*
+ * Copyright (C) 2021-2022 Mt.ZERO Software, Harry Godden - All Rights Reserved
+ */
+
+#include "common.h"
+#include "model.h"
+#include "camera.h"
+
+#include "shaders/blit.h"
+#include "shaders/blitblur.h"
+#include "shaders/standard.h"
+#include "shaders/vblend.h"
+
+VG_STATIC void render_water_texture( camera *cam );
+VG_STATIC void render_water_surface( camera *cam );
+VG_STATIC void render_world( camera *cam );
+VG_STATIC void shader_link_standard_ub( GLuint shader, int texture_id );
+VG_STATIC void render_world_depth( camera *cam );
+
#ifndef RENDER_H
#define RENDER_H
-#define VG_3D
-#include "vg/vg.h"
-static struct pipeline
+typedef struct framebuffer framebuffer;
+
+
+/*
+ * All standard buffers used in rendering
+ */
+VG_STATIC struct pipeline
+{
+ glmesh fsquad;
+
+ framebuffer *fb_main,
+ *fb_heightmap,
+ *fb_water_reflection,
+ *fb_water_beneath;
+
+ /* STD140 */
+ struct ub_world_lighting
+ {
+ /* v3f (padded) */
+ v4f g_light_colours[3],
+ g_light_directions[3],
+ g_ambient_colour;
+
+ v4f g_water_plane,
+ g_depth_bounds;
+
+ float g_water_fog;
+ int g_light_count;
+ int g_light_preview;
+ int g_shadow_samples;
+ }
+ ub_world_lighting;
+
+ struct light_widget
+ {
+ int enabled;
+ v2f dir;
+ v3f colour;
+ }
+ widgets[3];
+
+ float shadow_spread, shadow_length;
+ GLuint ubo_world_lighting,
+ ubo_world;
+
+ int ready;
+}
+gpipeline =
+{
+ .widgets =
+ {
+ {
+ .enabled = 1,
+ .colour = { 1.36f, 1.35f, 1.01f },
+ .dir = { 0.63f, -0.08f }
+ },
+ {
+ .enabled = 1,
+ .colour = { 0.33f, 0.56f, 0.64f },
+ .dir = { -2.60f, -0.13f }
+ },
+ {
+ .enabled = 1,
+ .colour = { 0.05f, 0.05f, 0.23f },
+ .dir = { 2.60f, -0.84f }
+ }
+ },
+ .shadow_spread = 0.65f,
+ .shadow_length = 9.50f,
+
+ .ub_world_lighting =
+ {
+ .g_ambient_colour = { 0.09f, 0.03f, 0.07f }
+ }
+};
+
+struct framebuffer
{
- float fov;
+ const char *display_name;
+ int resolution_div,
+ fixed_w,
+ fixed_h;
+
+ struct framebuffer_attachment
+ {
+ const char *display_name;
+
+ enum framebuffer_attachment_type
+ {
+ k_framebuffer_attachment_type_none,
+ k_framebuffer_attachment_type_colour,
+ k_framebuffer_attachment_type_renderbuffer
+ }
+ purpose;
+
+ enum framebuffer_quality_profile
+ {
+ k_framebuffer_quality_all,
+ k_framebuffer_quality_high_only
+ }
+ quality;
+
+ GLenum internalformat,
+ format,
+ type,
+ attachment;
+
+ GLuint id;
+ }
+ attachments[5];
+ GLuint fb;
+ framebuffer **link;
}
-gpipeline;
+framebuffers[] =
+{
+ {
+ /*
+ * The primary draw target
+ */
+ "Main",
+ .link = &gpipeline.fb_main,
+ .resolution_div = 1,
+ .attachments =
+ {
+ {
+ "Colour", k_framebuffer_attachment_type_colour,
+
+ .internalformat = GL_RGB,
+ .format = GL_RGB,
+ .type = GL_UNSIGNED_BYTE,
+ .attachment = GL_COLOR_ATTACHMENT0
+ },
+ {
+ "Motion Vectors", k_framebuffer_attachment_type_colour,
+
+ .quality = k_framebuffer_quality_high_only,
+ .internalformat = GL_RG16F,
+ .format = GL_RG,
+ .type = GL_FLOAT,
+ .attachment = GL_COLOR_ATTACHMENT1
+ },
+ {
+ "Depth/Stencil", k_framebuffer_attachment_type_renderbuffer,
+
+ .internalformat = GL_DEPTH24_STENCIL8,
+ .attachment = GL_DEPTH_STENCIL_ATTACHMENT
+ }
+ }
+ },
+ {
+ /*
+ * A ortho projection of the world, used for shadows and ocean colouring.
+ * Note: it does not have a render buffer attachement because it's
+ * intended to be drawn to in a MAX blending mode
+ */
+ "Heightmap",
+ .link = &gpipeline.fb_heightmap,
+ .fixed_w = 1024,
+ .fixed_h = 1024,
-static void render_water_texture( m4x3f camera );
-static void render_water_surface( m4x4f pv );
-static void render_world( m4x4f projection, m4x3f camera );
+ .attachments =
+ {
+ {
+ "Depth", k_framebuffer_attachment_type_colour,
+
+ .internalformat = GL_R32F,
+ .format = GL_RED,
+ .type = GL_FLOAT,
+ .attachment = GL_COLOR_ATTACHMENT0
+ }
+ }
+ },
+ {
+ /*
+ * Second rendered view from the perspective of the water reflection
+ */
+ "Water reflection",
+ .link = &gpipeline.fb_water_reflection,
+ .resolution_div = 3,
+ .attachments =
+ {
+ {
+ "Colour", k_framebuffer_attachment_type_colour,
+ .internalformat = GL_RGB,
+ .format = GL_RGB,
+ .type = GL_UNSIGNED_BYTE,
+ .attachment = GL_COLOR_ATTACHMENT0
+ },
+ {
+ "Depth/Stencil", k_framebuffer_attachment_type_renderbuffer,
+
+ .internalformat = GL_DEPTH24_STENCIL8,
+ .attachment = GL_DEPTH_STENCIL_ATTACHMENT
+ }
+ }
+ },
+ {
+ /*
+ * Thid rendered view from the perspective of the camera, but just
+ * captures stuff thats under the water
+ */
+ "Water Beneath",
+ .link = &gpipeline.fb_water_beneath,
+ .resolution_div = 4,
+ .attachments =
+ {
+ {
+ "Colour", k_framebuffer_attachment_type_colour,
+ .internalformat = GL_RGBA,
+ .format = GL_RGBA,
+ .type = GL_UNSIGNED_BYTE,
+ .attachment = GL_COLOR_ATTACHMENT0
+ },
+ {
+ "Depth/Stencil", k_framebuffer_attachment_type_renderbuffer,
+
+ .internalformat = GL_DEPTH24_STENCIL8,
+ .attachment = GL_DEPTH_STENCIL_ATTACHMENT
+ }
+ }
+ }
+};
/*
- * http://www.terathon.com/lengyel/Lengyel-Oblique.pdf
+ * Get the current (automatically scaled or fixed) resolution of framebuffer
*/
-static void plane_clip_projection( m4x4f mat, v4f plane )
+VG_STATIC void render_fb_get_current_res( struct framebuffer *fb,
+ int *x, int *y )
{
- v4f c =
+ if( fb->resolution_div )
+ {
+ *x = vg.window_x / fb->resolution_div;
+ *y = vg.window_y / fb->resolution_div;
+ }
+ else
{
- (vg_signf(plane[0]) + mat[2][0]) / mat[0][0],
- (vg_signf(plane[1]) + mat[2][1]) / mat[1][1],
- -1.0f,
- (1.0f + mat[2][2]) / mat[3][2]
+ *x = fb->fixed_w;
+ *y = fb->fixed_h;
+ }
+}
+
+/*
+ * Bind framebuffer for drawing to
+ */
+VG_STATIC void render_fb_bind( framebuffer *fb )
+{
+ int x, y;
+ render_fb_get_current_res( fb, &x, &y );
+ glBindFramebuffer( GL_FRAMEBUFFER, fb->fb );
+ glViewport( 0, 0, x, y );
+}
+
+/*
+ * Bind framebuffer attachment's texture
+ */
+VG_STATIC void render_fb_bind_texture( framebuffer *fb,
+ int attachment, int slot )
+{
+ struct framebuffer_attachment *at = &fb->attachments[attachment];
+
+ if( at->purpose != k_framebuffer_attachment_type_colour )
+ {
+ vg_fatal_exit_loop( "illegal operation: bind non-colour framebuffer"
+ " attachment to texture slot" );
+ }
+
+ glActiveTexture( GL_TEXTURE0 + slot );
+ glBindTexture( GL_TEXTURE_2D, fb->attachments[attachment].id );
+}
+
+
+/*
+ * Shaders
+ */
+VG_STATIC void shader_link_standard_ub( GLuint shader, int texture_id )
+{
+ GLuint idx = glGetUniformBlockIndex( shader, "ub_world_lighting" );
+ glUniformBlockBinding( shader, idx, 0 );
+
+ render_fb_bind_texture( gpipeline.fb_heightmap, 0, texture_id );
+ glUniform1i( glGetUniformLocation( shader, "g_world_depth" ), texture_id );
+}
+
+VG_STATIC void render_update_lighting_ub(void)
+{
+ struct ub_world_lighting *winf = &gpipeline.ub_world_lighting;
+ int c = 0;
+
+ for( int i=0; i<3; i++ )
+ {
+ struct light_widget *lw = &gpipeline.widgets[i];
+
+ if( lw->enabled )
+ {
+ float pitch = lw->dir[0],
+ yaw = lw->dir[1],
+ xz = cosf( pitch );
+
+ v3_copy( (v3f){ xz*cosf(yaw), sinf(pitch), xz*sinf(yaw) },
+ winf->g_light_directions[c] );
+ v3_copy( lw->colour, winf->g_light_colours[c] );
+
+ c ++;
+ }
+ }
+
+ winf->g_light_count = c;
+ winf->g_light_directions[0][3] = gpipeline.shadow_length;
+ winf->g_light_colours[0][3] = gpipeline.shadow_spread;
+
+ if( vg.quality_profile == k_quality_profile_low )
+ winf->g_shadow_samples = 0;
+ else
+ winf->g_shadow_samples = 8;
+
+ glBindBuffer( GL_UNIFORM_BUFFER, gpipeline.ubo_world_lighting );
+ glBufferSubData( GL_UNIFORM_BUFFER, 0, sizeof(struct ub_world_lighting),
+ &gpipeline.ub_world_lighting );
+}
+
+#define FB_FORMAT_STR( E ) { E, #E },
+
+/*
+ * Convert OpenGL attachment ID enum to string
+ */
+VG_STATIC const char *render_fb_attachment_str( GLenum e )
+{
+ struct { GLenum e; const char *str; }
+ formats[] =
+ {
+ FB_FORMAT_STR(GL_COLOR_ATTACHMENT0)
+ FB_FORMAT_STR(GL_COLOR_ATTACHMENT1)
+ FB_FORMAT_STR(GL_COLOR_ATTACHMENT2)
+ FB_FORMAT_STR(GL_COLOR_ATTACHMENT3)
+ FB_FORMAT_STR(GL_COLOR_ATTACHMENT4)
+ FB_FORMAT_STR(GL_DEPTH_STENCIL_ATTACHMENT)
};
- v4_muls( plane, 2.0f / v4_dot(plane,c), c );
+ for( int i=0; i<vg_list_size(formats); i++ )
+ if( formats[i].e == e )
+ return formats[i].str;
- mat[0][2] = c[0];
- mat[1][2] = c[1];
- mat[2][2] = c[2] + 1.0f;
- mat[3][2] = c[3];
+ return "UNDEFINED";
}
-static void pipeline_projection( m4x4f mat, float nearz, float farz )
+/*
+ * Convert OpenGL texture format enums from TexImage2D table 1,2 &
+ * RenderBufferStorage Table 1, into strings
+ */
+VG_STATIC const char *render_fb_format_str( GLenum format )
{
- m4x4_projection( mat,
- gpipeline.fov,
- (float)vg_window_x / (float)vg_window_y,
- nearz, farz );
+ struct { GLenum e; const char *str; }
+ formats[] =
+ {
+ /* Table 1 */
+ FB_FORMAT_STR(GL_DEPTH_COMPONENT)
+ FB_FORMAT_STR(GL_DEPTH_STENCIL)
+ FB_FORMAT_STR(GL_RED)
+ FB_FORMAT_STR(GL_RG)
+ FB_FORMAT_STR(GL_RGB)
+ FB_FORMAT_STR(GL_RGBA)
+
+ /* Render buffer formats */
+ FB_FORMAT_STR(GL_DEPTH_COMPONENT16)
+ FB_FORMAT_STR(GL_DEPTH_COMPONENT24)
+ FB_FORMAT_STR(GL_DEPTH_COMPONENT32F)
+ FB_FORMAT_STR(GL_DEPTH24_STENCIL8)
+ FB_FORMAT_STR(GL_DEPTH32F_STENCIL8)
+ FB_FORMAT_STR(GL_STENCIL_INDEX8)
+
+ /* Table 2 */
+ FB_FORMAT_STR(GL_R8)
+ FB_FORMAT_STR(GL_R8_SNORM)
+ FB_FORMAT_STR(GL_R16)
+ FB_FORMAT_STR(GL_R16_SNORM)
+ FB_FORMAT_STR(GL_RG8)
+ FB_FORMAT_STR(GL_RG8_SNORM)
+ FB_FORMAT_STR(GL_RG16)
+ FB_FORMAT_STR(GL_RG16_SNORM)
+ FB_FORMAT_STR(GL_R3_G3_B2)
+ FB_FORMAT_STR(GL_RGB4)
+ FB_FORMAT_STR(GL_RGB5)
+ FB_FORMAT_STR(GL_RGB8)
+ FB_FORMAT_STR(GL_RGB8_SNORM)
+ FB_FORMAT_STR(GL_RGB10)
+ FB_FORMAT_STR(GL_RGB12)
+ FB_FORMAT_STR(GL_RGB16_SNORM)
+ FB_FORMAT_STR(GL_RGBA2)
+ FB_FORMAT_STR(GL_RGBA4)
+ FB_FORMAT_STR(GL_RGB5_A1)
+ FB_FORMAT_STR(GL_RGBA8)
+ FB_FORMAT_STR(GL_RGBA8_SNORM)
+ FB_FORMAT_STR(GL_RGB10_A2)
+ FB_FORMAT_STR(GL_RGB10_A2UI)
+ FB_FORMAT_STR(GL_RGBA12)
+ FB_FORMAT_STR(GL_RGBA16)
+ FB_FORMAT_STR(GL_SRGB8)
+ FB_FORMAT_STR(GL_SRGB8_ALPHA8)
+ FB_FORMAT_STR(GL_R16F)
+ FB_FORMAT_STR(GL_RG16F)
+ FB_FORMAT_STR(GL_RGB16F)
+ FB_FORMAT_STR(GL_RGBA16F)
+ FB_FORMAT_STR(GL_R32F)
+ FB_FORMAT_STR(GL_RG32F)
+ FB_FORMAT_STR(GL_RGB32F)
+ FB_FORMAT_STR(GL_RGBA32F)
+ FB_FORMAT_STR(GL_R11F_G11F_B10F)
+ FB_FORMAT_STR(GL_RGB9_E5)
+ FB_FORMAT_STR(GL_R8I)
+ FB_FORMAT_STR(GL_R8UI)
+ FB_FORMAT_STR(GL_R16I)
+ FB_FORMAT_STR(GL_R16UI)
+ FB_FORMAT_STR(GL_R32I)
+ FB_FORMAT_STR(GL_R32UI)
+ FB_FORMAT_STR(GL_RG8I)
+ FB_FORMAT_STR(GL_RG8UI)
+ FB_FORMAT_STR(GL_RG16I)
+ FB_FORMAT_STR(GL_RG16UI)
+ FB_FORMAT_STR(GL_RG32I)
+ FB_FORMAT_STR(GL_RG32UI)
+ FB_FORMAT_STR(GL_RGB8I)
+ FB_FORMAT_STR(GL_RGB8UI)
+ FB_FORMAT_STR(GL_RGB16I)
+ FB_FORMAT_STR(GL_RGB16UI)
+ FB_FORMAT_STR(GL_RGB32I)
+ FB_FORMAT_STR(GL_RGB32UI)
+ FB_FORMAT_STR(GL_RGBA8I)
+ FB_FORMAT_STR(GL_RGBA8UI)
+ FB_FORMAT_STR(GL_RGBA16I)
+ FB_FORMAT_STR(GL_RGBA16UI)
+ FB_FORMAT_STR(GL_RGBA32I)
+ FB_FORMAT_STR(GL_RGBA32UI)
+ };
+
+ for( int i=0; i<vg_list_size(formats); i++ )
+ if( formats[i].e == format )
+ return formats[i].str;
+
+ return "UNDEFINED";
}
-static void create_renderbuffer_std( GLuint *fb, GLuint *rgb, GLuint *rb )
+/*
+ * Bind and allocate texture for framebuffer attachment
+ */
+VG_STATIC void render_fb_allocate_texture( struct framebuffer *fb,
+ struct framebuffer_attachment *a )
{
- glGenFramebuffers( 1, fb );
- glBindFramebuffer( GL_FRAMEBUFFER, *fb );
+ int rx, ry;
+ render_fb_get_current_res( fb, &rx, &ry );
+
+ if( a->purpose == k_framebuffer_attachment_type_renderbuffer )
+ {
+ glBindRenderbuffer( GL_RENDERBUFFER, a->id );
+ glRenderbufferStorage( GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, rx, ry );
+ }
+ else if( a->purpose == k_framebuffer_attachment_type_colour )
+ {
+ glBindTexture( GL_TEXTURE_2D, a->id );
+ glTexImage2D( GL_TEXTURE_2D, 0, a->internalformat, rx, ry,
+ 0, a->format, a->type, NULL );
+ }
+}
+
+/*
+ * Full allocation of a framebuffer
+ */
+VG_STATIC void render_fb_allocate( struct framebuffer *fb )
+{
+ glGenFramebuffers( 1, &fb->fb );
+ glBindFramebuffer( GL_FRAMEBUFFER, fb->fb );
+
+ int rx, ry;
+ render_fb_get_current_res( fb, &rx, &ry );
+
+ vg_info( "allocate_framebuffer( %s, %dx%d )\n", fb->display_name, rx, ry );
+ vg_info( "{\n" );
+
+ GLenum colour_attachments[4];
+ u32 colour_count = 0;
+
+ for( int j=0; j<vg_list_size(fb->attachments); j++ )
+ {
+ struct framebuffer_attachment *attachment = &fb->attachments[j];
- glGenTextures( 1, rgb );
- glBindTexture( GL_TEXTURE_2D, *rgb );
- glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, vg_window_x, vg_window_y,
- 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
+ if( attachment->purpose == k_framebuffer_attachment_type_none )
+ continue;
+
+ vg_info( " %s: %s\n",
+ render_fb_attachment_str( attachment->attachment ),
+ render_fb_format_str( attachment->internalformat ) );
+
+ if( attachment->purpose == k_framebuffer_attachment_type_renderbuffer )
+ {
+ glGenRenderbuffers( 1, &attachment->id );
+ render_fb_allocate_texture( fb, attachment );
+ glFramebufferRenderbuffer( GL_FRAMEBUFFER,
+ GL_DEPTH_STENCIL_ATTACHMENT,
+ GL_RENDERBUFFER, attachment->id );
+ }
+ else if( attachment->purpose == k_framebuffer_attachment_type_colour )
+ {
+ glGenTextures( 1, &attachment->id );
+ render_fb_allocate_texture( fb, attachment );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
+
+ glFramebufferTexture2D( GL_FRAMEBUFFER, attachment->attachment,
+ GL_TEXTURE_2D, attachment->id, 0 );
+
+ colour_attachments[ colour_count ++ ] = attachment->attachment;
+ }
+ }
+
+ glDrawBuffers( colour_count, colour_attachments );
+
+ /*
+ * Check result
+ */
+ GLenum result = glCheckFramebufferStatus( GL_FRAMEBUFFER );
+
+ if( result == GL_FRAMEBUFFER_COMPLETE )
+ {
+ /*
+ * Attatch to gpipeline
+ */
+ if( fb->link )
+ *fb->link = fb;
+
+ vg_success( " status: complete\n" );
+ vg_info( "}\n" );
+ }
+ else
+ {
+ if( result == GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT )
+ vg_error( " status: Incomplete attachment" );
+ else if( result == GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT )
+ vg_error( " status: Missing attachment" );
+ else if( result == GL_FRAMEBUFFER_UNSUPPORTED )
+ vg_error( " status: Unsupported framebuffer format" );
+ else
+ vg_error( " status: Generic Error" );
+
+ vg_info( "}\n" );
+ vg_fatal_exit_loop( "Incomplete framebuffer (see logs)" );
+ }
+}
+
+/*
+ * Resize/Update all framebuffers(we know about)
+ */
+VG_STATIC void render_fb_resize(void)
+{
+ if( !gpipeline.ready )
+ return;
+
+ for( int i=0; i<vg_list_size(framebuffers); i++ )
+ {
+ struct framebuffer *fb = &framebuffers[i];
+ for( int j=0; j<vg_list_size(fb->attachments); j++ )
+ {
+ struct framebuffer_attachment *attachment = &fb->attachments[j];
+ render_fb_allocate_texture( fb, attachment );
+ }
+ }
+}
+
+#if 0
+VG_STATIC void fb_use( struct framebuffer *fb )
+{
+ if( !fb )
+ {
+ glBindFramebuffer( GL_FRAMEBUFFER, gpipeline.fb_background );
+ glViewport( 0, 0, vg.window_x, vg.window_y );
+ }
+ else
+ {
+ glBindFramebuffer( GL_FRAMEBUFFER, fb->fb );
+ glViewport( 0, 0, vg.window_x / fb->div, vg.window_y / fb->div );
+ }
+}
+
+VG_STATIC void fb_init( struct framebuffer *fb )
+{
+ i32 ix = vg.window_x / fb->div,
+ iy = vg.window_y / fb->div;
+
+ glGenFramebuffers( 1, &fb->fb );
+ glBindFramebuffer( GL_FRAMEBUFFER, fb->fb );
+
+ glGenTextures( 1, &fb->colour );
+ glBindTexture( GL_TEXTURE_2D, fb->colour );
+ glTexImage2D( GL_TEXTURE_2D, 0, fb->format, ix, iy,
+ 0, fb->format, GL_UNSIGNED_BYTE, NULL);
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
- GL_TEXTURE_2D, *rgb, 0);
+ GL_TEXTURE_2D, fb->colour, 0);
+
+ glGenRenderbuffers( 1, &fb->rb );
+ glBindRenderbuffer( GL_RENDERBUFFER, fb->rb );
+ glRenderbufferStorage( GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, ix, iy );
+
+ glFramebufferRenderbuffer( GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
+ GL_RENDERBUFFER, fb->rb );
+ glBindFramebuffer( GL_FRAMEBUFFER, 0 );
+
+ VG_CHECK_GL_ERR();
+ fb->allocated = 1;
+}
+
+VG_STATIC void _fb_glTexImage2D( GLsizei x, GLsizei y, GLint internalformat,
+ GLenum format, GLenum type, const void *data )
+{
+ glTexImage2D( GL_TEXTURE_2D, 0, internalformat, x,y, 0,
+ format, type, data );
+
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
+}
+
+#define fb_tex2d( X,Y, INTERNAL_FORMAT, FORMAT, TYPE, DATA ) \
+ _fb_glTexImage2D( X,Y, INTERNAL_FORMAT, FORMAT, TYPE, DATA ); \
+ vg_info( "texture( %dx%d, internal: %s, format: %s, type: %s )\n", \
+ X,Y, #INTERNAL_FORMAT, #FORMAT, #TYPE );
+
+VG_STATIC void fb_free( struct framebuffer *fb )
+{
+ glDeleteTextures( 1, &fb->colour );
+ glDeleteFramebuffers( 1, &fb->fb );
+}
+
+VG_STATIC void fb_bindtex( struct framebuffer *fb, int texture )
+{
+ glActiveTexture( GL_TEXTURE0 + texture );
+ glBindTexture( GL_TEXTURE_2D, fb->colour );
+}
+
+VG_STATIC void fb_resize( struct framebuffer *fb )
+{
+ if( !fb->allocated )
+ return;
+
+ i32 ix = vg.window_x / fb->div,
+ iy = vg.window_y / fb->div;
+
+ glBindTexture( GL_TEXTURE_2D, fb->colour );
+ glTexImage2D( GL_TEXTURE_2D, 0, fb->format, ix, iy, 0,
+ fb->format, GL_UNSIGNED_BYTE, NULL );
+
+ glBindRenderbuffer( GL_RENDERBUFFER, fb->rb );
+ glRenderbufferStorage( GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, ix, iy );
+}
+#endif
+
+#if 0
+VG_STATIC void render_init_temp_buffer(void)
+{
+ vg_info( "[render] Allocate framebuffer\n" );
+
+ glGenFramebuffers( 1, &gpipeline.fb_background );
+ glBindFramebuffer( GL_FRAMEBUFFER, gpipeline.fb_background );
+
+ glGenTextures( 1, &gpipeline.rgb_background );
+ glBindTexture( GL_TEXTURE_2D, gpipeline.rgb_background );
+ fb_tex2d( vg.window_x, vg.window_y, GL_RGB, GL_RGB, GL_UNSIGNED_BYTE, NULL );
+ glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ GL_TEXTURE_2D,
+ gpipeline.rgb_background, 0 );
- /* TODO: Check for DEPTH32f availiblity and use if possible */
+ glGenTextures( 1, &gpipeline.mv_background );
+ glBindTexture( GL_TEXTURE_2D, gpipeline.mv_background );
+#if 0
+ glTexImage2D( GL_TEXTURE_2D, 0, GL_RG, vg.window_x, vg.window_y,
+ 0, GL_RG, GL_FLOAT, NULL);
+#endif
+ glTexImage2D( GL_TEXTURE_2D, 0, GL_RG16F, vg.window_x, vg.window_y,
+ 0, GL_RG, GL_FLOAT, NULL);
- glGenRenderbuffers( 1, rb );
- glBindRenderbuffer( GL_RENDERBUFFER, *rb );
- glRenderbufferStorage( GL_RENDERBUFFER, GL_DEPTH24_STENCIL8,
- vg_window_x, vg_window_y );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
+ glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1,
+ GL_TEXTURE_2D,
+ gpipeline.mv_background, 0 );
+ /* render buffer */
+ glGenRenderbuffers( 1, &gpipeline.rb_background );
+ glBindRenderbuffer( GL_RENDERBUFFER, gpipeline.rb_background );
+ glRenderbufferStorage( GL_RENDERBUFFER, GL_DEPTH24_STENCIL8,
+ vg.window_x, vg.window_y );
glFramebufferRenderbuffer( GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
- GL_RENDERBUFFER, *rb );
+ GL_RENDERBUFFER, gpipeline.rb_background );
+
+ GLuint attachments[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 };
+ glDrawBuffers( 2, attachments );
+
+ render_check_framebuffer_complete();
+
+ glBindFramebuffer( GL_FRAMEBUFFER, 0 );
+ VG_CHECK_GL_ERR();
+}
+
+/* used for drawing world depth from the top view, used in our water and
+ * lighting calculations */
+VG_STATIC void render_init_depthmap_buffer(void)
+{
+ vg_info( "[render] Allocate depth map buffer\n" );
+
+ glGenFramebuffers( 1, &gpipeline.fb_depthmap );
+ glBindFramebuffer( GL_FRAMEBUFFER, gpipeline.fb_depthmap );
+
+ glGenTextures( 1, &gpipeline.rgb_depthmap );
+ glBindTexture( GL_TEXTURE_2D, gpipeline.rgb_depthmap );
+ glTexImage2D( GL_TEXTURE_2D, 0, GL_R32F, 1024, 1024, 0,
+ GL_RED, GL_FLOAT, NULL );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+ glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+ vg_tex2d_clamp();
+
+ glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ GL_TEXTURE_2D,
+ gpipeline.rgb_depthmap, 0);
+
+ render_check_framebuffer_complete();
+ VG_CHECK_GL_ERR();
}
+#endif
-static void resize_renderbuffer_std( GLuint *fb, GLuint *rgb, GLuint *rb )
+VG_STATIC void render_init_fs_quad(void)
{
- glBindTexture( GL_TEXTURE_2D, *rgb );
- glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, vg_window_x, vg_window_y, 0,
- GL_RGB, GL_UNSIGNED_BYTE, NULL );
+ vg_info( "[render] Allocate quad\n" );
+
+ float quad[] = { 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f,
+ 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f,
- glBindRenderbuffer( GL_RENDERBUFFER, *rb );
- glRenderbufferStorage( GL_RENDERBUFFER, GL_DEPTH24_STENCIL8,
- vg_window_x, vg_window_y );
+ 0.2f, 0.0f, 0.8f, 1.0f, 0.2f, 1.0f,
+ 0.2f, 0.0f, 0.8f, 0.0f, 0.8f, 1.0f};
+
+ glGenVertexArrays( 1, &gpipeline.fsquad.vao );
+ glGenBuffers( 1, &gpipeline.fsquad.vbo );
+ glBindVertexArray( gpipeline.fsquad.vao );
+ glBindBuffer( GL_ARRAY_BUFFER, gpipeline.fsquad.vbo );
+ glBufferData( GL_ARRAY_BUFFER, sizeof(quad), quad, GL_STATIC_DRAW );
+ glBindVertexArray( gpipeline.fsquad.vao );
+ glVertexAttribPointer( 0, 2, GL_FLOAT, GL_FALSE,
+ sizeof(float)*2, (void*)0 );
+ glEnableVertexAttribArray( 0 );
+
+ VG_CHECK_GL_ERR();
+}
+
+VG_STATIC void render_init_uniform_buffers(void)
+{
+ vg_info( "[render] Allocate uniform buffer\n" );
+
+ glGenBuffers( 1, &gpipeline.ubo_world_lighting );
+ glBindBuffer( GL_UNIFORM_BUFFER, gpipeline.ubo_world_lighting );
+ glBufferData( GL_UNIFORM_BUFFER, sizeof(struct ub_world_lighting),
+ NULL, GL_DYNAMIC_DRAW );
+
+ render_update_lighting_ub();
+ glBindBufferBase( GL_UNIFORM_BUFFER, 0, gpipeline.ubo_world_lighting );
+
+ VG_CHECK_GL_ERR();
+}
+
+VG_STATIC void render_init(void)
+{
+ shader_blit_register();
+ shader_blitblur_register();
+ shader_standard_register();
+ shader_vblend_register();
+
+ vg_acquire_thread_sync();
+ {
+ /*
+ * Complete Framebuffers
+ */
+ for( int i=0; i<vg_list_size(framebuffers); i++ )
+ {
+ struct framebuffer *fb = &framebuffers[i];
+ render_fb_allocate( fb );
+ }
+
+ render_init_fs_quad();
+ render_init_uniform_buffers();
+
+ glBindFramebuffer( GL_FRAMEBUFFER, 0 );
+ gpipeline.ready = 1;
+ }
+
+ vg_release_thread_sync();
+}
+
+/*
+ * Utility
+ */
+VG_STATIC void render_fsquad(void)
+{
+ glBindVertexArray( gpipeline.fsquad.vao );
+ glDrawArrays( GL_TRIANGLES, 0, 6 );
+}
+
+VG_STATIC void render_fsquad1(void)
+{
+ glBindVertexArray( gpipeline.fsquad.vao );
+ glDrawArrays( GL_TRIANGLES, 6, 6 );
}
#endif /* RENDER_H */
projects / carveJwlIkooP6JGAAIwe30JlM.git / blobdiff