X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=render.h;h=317b30110bc2d6df942816a258f60940871eec82;hb=a1741ec4aed057cbafff2d6bc9e5cf8a15ae322b;hp=aa738425422d0365720b881ee6272ab7e01805a2;hpb=168eb5c363f510d60703498e01ffcdb52bf9fd07;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/render.h b/render.h
index aa73842..317b301 100644
--- a/render.h
+++ b/render.h
@@ -1,10 +1,33 @@
-#ifndef RENDER_H
-#define RENDER_H
+/*
+ * Copyright (C) 2021-2022 Mt.ZERO Software, Harry Godden - All Rights Reserved
+ */
 
 #include "common.h"
 #include "model.h"
 
-static struct pipeline
+#include "shaders/blit.h"
+#include "shaders/standard.h"
+#include "shaders/vblend.h"
+
+VG_STATIC void render_water_texture( m4x3f camera );
+VG_STATIC void render_water_surface( m4x4f pv, m4x3f camera );
+VG_STATIC void render_world( m4x4f projection, m4x3f camera );
+VG_STATIC void shader_link_standard_ub( GLuint shader, int texture_id );
+VG_STATIC void render_world_depth( m4x4f projection, m4x3f camera );
+
+#ifndef RENDER_H
+#define RENDER_H
+
+struct framebuffer
+{
+   GLuint fb, colour, rb;
+   int div;
+   GLuint format;
+
+   int allocated;
+};
+
+VG_STATIC struct pipeline
 {
    float fov;
    glmesh fsquad;
@@ -26,6 +49,7 @@ static struct pipeline
       float g_water_fog;
       int g_light_count;
       int g_light_preview;
+      int g_shadow_samples;
    }
    ub_world_lighting;
 
@@ -42,6 +66,8 @@ static struct pipeline
    GLuint fb_depthmap, rgb_depthmap;
    GLuint ubo_world_lighting,
           ubo_world;
+
+   int ready;
 }
 gpipeline =
 {
@@ -72,18 +98,13 @@ gpipeline =
    }
 };
 
-static void render_water_texture( m4x3f camera );
-static void render_water_surface( m4x4f pv, m4x3f camera );
-static void render_world( m4x4f projection, m4x3f camera );
-static void render_world_depth( m4x4f projection, m4x3f camera );
-
 /* 
  * Matrix Projections
  */
 /* 
  * http://www.terathon.com/lengyel/Lengyel-Oblique.pdf 
  */
-static void plane_clip_projection( m4x4f mat, v4f plane )
+VG_STATIC void plane_clip_projection( m4x4f mat, v4f plane )
 {
    v4f c = 
    {
@@ -101,18 +122,18 @@ static void plane_clip_projection( m4x4f mat, v4f plane )
    mat[3][2] = c[3];
 }
 
-static void pipeline_projection( m4x4f mat, float nearz, float farz )
+VG_STATIC void pipeline_projection( m4x4f mat, float nearz, float farz )
 {
    m4x4_projection( mat,
          gpipeline.fov,
-         (float)vg_window_x / (float)vg_window_y, 
+         (float)vg.window_x / (float)vg.window_y, 
          nearz, farz );
 }
 
 /*
  * Shaders
  */
-static void shader_link_standard_ub( GLuint shader, int texture_id )
+VG_STATIC void shader_link_standard_ub( GLuint shader, int texture_id )
 {
    GLuint idx = glGetUniformBlockIndex( shader, "ub_world_lighting" );   
    glUniformBlockBinding( shader, idx, 0 );
@@ -122,7 +143,7 @@ static void shader_link_standard_ub( GLuint shader, int texture_id )
    glUniform1i( glGetUniformLocation( shader, "g_world_depth" ), texture_id );
 }
 
-static void render_update_lighting_ub(void)
+VG_STATIC void render_update_lighting_ub(void)
 {
    struct ub_world_lighting *winf = &gpipeline.ub_world_lighting;
    int c = 0;
@@ -149,50 +170,38 @@ static void render_update_lighting_ub(void)
    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 );
 }
 
-static void render_alloc_ub(void)
-{
-   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 );
-}
-
 /* 
  * Framebuffers
  */
-struct framebuffer
-{
-   GLuint fb, colour, rb;
-   int div;
-   GLuint format;
-};
 
-static void fb_use( struct framebuffer *fb )
+VG_STATIC void fb_use( struct framebuffer *fb )
 {
    if( !fb )
    {
       glBindFramebuffer( GL_FRAMEBUFFER, 0 );
-      glViewport( 0, 0, vg_window_x, vg_window_y );
+      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 );
+      glViewport( 0, 0, vg.window_x / fb->div, vg.window_y / fb->div );
    }
 }
 
-static void fb_init( struct framebuffer *fb )
+VG_STATIC void fb_init( struct framebuffer *fb )
 {
-   i32 ix = vg_window_x / fb->div,
-       iy = vg_window_y / fb->div;
+   i32 ix = vg.window_x / fb->div,
+       iy = vg.window_y / fb->div;
 
    glGenFramebuffers( 1, &fb->fb );
    glBindFramebuffer( GL_FRAMEBUFFER, fb->fb );
@@ -213,18 +222,31 @@ static void fb_init( struct framebuffer *fb )
 
    glFramebufferRenderbuffer( GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
          GL_RENDERBUFFER, fb->rb );
+   glBindFramebuffer( GL_FRAMEBUFFER, 0 );
+
+   VG_CHECK_GL_ERR();
+   fb->allocated = 1;
 }
 
-static void fb_bindtex( struct framebuffer *fb, int texture )
+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 );
 }
 
-static void fb_resize( struct framebuffer *fb )
+VG_STATIC void fb_resize( struct framebuffer *fb )
 {
-   i32 ix = vg_window_x / fb->div,
-       iy = vg_window_y / fb->div;
+   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,
@@ -234,24 +256,27 @@ static void fb_resize( struct framebuffer *fb )
    glRenderbufferStorage( GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, ix, iy );
 }
 
-static void render_fb_resize(void)
+VG_STATIC void render_fb_resize(void)
 {
-   glBindTexture( GL_TEXTURE_2D, gpipeline.rgb_background );
-   glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, vg_window_x, vg_window_y, 0, 
-         GL_RGB, GL_UNSIGNED_BYTE, NULL );
+   if( gpipeline.ready )
+   {
+      glBindTexture( GL_TEXTURE_2D, gpipeline.rgb_background );
+      glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, vg.window_x, vg.window_y, 0, 
+            GL_RGB, GL_UNSIGNED_BYTE, NULL );
+   }
 }
 
-/*
- * Vg
- */
-static void render_init(void)
+/* used for drawing player onto */
+VG_STATIC void render_init_temp_buffer(void)
 {
+   vg_info( "[render] Allocate temporary 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 );
-   glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, vg_window_x, vg_window_y, 
+   glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, vg.window_x, vg.window_y, 
          0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
 
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
@@ -260,10 +285,15 @@ static void render_init(void)
          GL_TEXTURE_2D, 
          gpipeline.rgb_background, 0);
 
-   /* 
-    * World depth map, maybe this should be moved to world.h
-    * TODO: review
-    */
+   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 );
 
@@ -279,6 +309,13 @@ static void render_init(void)
          GL_TEXTURE_2D, 
          gpipeline.rgb_depthmap, 0);
 
+   VG_CHECK_GL_ERR();
+}
+
+VG_STATIC void render_init_fs_quad(void)
+{
+   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 };
 
@@ -291,20 +328,49 @@ static void render_init(void)
    glVertexAttribPointer( 0, 2, GL_FLOAT, GL_FALSE, 
          sizeof(float)*2, (void*)0 );
    glEnableVertexAttribArray( 0 );
-   VG_CHECK_GL();
 
-   render_alloc_ub();
+   VG_CHECK_GL_ERR();
 }
 
-static void render_free(void)
+VG_STATIC void render_init_uniform_buffers(void)
 {
-   /* TODO: ... */
+   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_standard_register();
+   shader_vblend_register();
+
+   vg_acquire_thread_sync();
+   {
+      render_init_temp_buffer();
+      render_init_depthmap_buffer();
+      render_init_fs_quad();
+      render_init_uniform_buffers();
+
+      glBindFramebuffer( GL_FRAMEBUFFER, 0 );
+      gpipeline.ready = 1;
+   }
+
+   vg_release_thread_sync();
 }
 
 /*
  * Utility
  */
-static void render_fsquad(void)
+VG_STATIC void render_fsquad(void)
 {
    glBindVertexArray( gpipeline.fsquad.vao );
    glDrawArrays( GL_TRIANGLES, 0, 6 );