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Simplify Sokol rendering process

This commit is contained in:
Shiqing 2019-03-17 14:42:39 +08:00
parent b67e4dbb4c
commit e968db3458
2 changed files with 7 additions and 41 deletions
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src/system/.sokol_gfx.c.swp Normal file
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48
src/system/sokol_gfx.c
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@ -2,8 +2,6 @@
static struct static struct
{ {
sg_draw_state upscale_draw_state;
sg_pass upscale_pass;
sg_draw_state draw_state; sg_draw_state draw_state;
int fb_width; int fb_width;
int fb_height; int fb_height;
@ -130,13 +128,9 @@ void sokol_gfx_init(int w, int h, int sx, int sy, bool integer_scale, bool portr
0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
1.0f, 1.0f, 1.0f, 0.0f 1.0f, 1.0f, 1.0f, 0.0f
}; };
sokol_gfx.upscale_draw_state.vertex_buffers[0] = sg_make_buffer(&(sg_buffer_desc){
.size = sizeof(verts),
.content = verts,
});
sokol_gfx.draw_state.vertex_buffers[0] = sg_make_buffer(&(sg_buffer_desc){ sokol_gfx.draw_state.vertex_buffers[0] = sg_make_buffer(&(sg_buffer_desc){
.size = sizeof(verts), .size = sizeof(verts),
.content = sg_query_feature(SG_FEATURE_ORIGIN_TOP_LEFT) ? verts : verts_flipped .content = sg_query_feature(SG_FEATURE_ORIGIN_TOP_LEFT) ? verts_flipped : verts,
}); });
/* a shader to render a textured quad */ /* a shader to render a textured quad */
@ -148,7 +142,7 @@ void sokol_gfx_init(int w, int h, int sx, int sy, bool integer_scale, bool portr
.fs.source = gfx_fs_src, .fs.source = gfx_fs_src,
}); });
/* 2 pipeline-state-objects, one for upscaling, one for rendering */ /* a pipeline-state-object for rendering */
sg_pipeline_desc pip_desc = { sg_pipeline_desc pip_desc = {
.layout = { .layout = {
.attrs[0] = { .name="in_pos", .sem_name="POS", .format=SG_VERTEXFORMAT_FLOAT2 }, .attrs[0] = { .name="in_pos", .sem_name="POS", .format=SG_VERTEXFORMAT_FLOAT2 },
@ -158,11 +152,9 @@ void sokol_gfx_init(int w, int h, int sx, int sy, bool integer_scale, bool portr
.primitive_type = SG_PRIMITIVETYPE_TRIANGLE_STRIP .primitive_type = SG_PRIMITIVETYPE_TRIANGLE_STRIP
}; };
sokol_gfx.draw_state.pipeline = sg_make_pipeline(&pip_desc); sokol_gfx.draw_state.pipeline = sg_make_pipeline(&pip_desc);
pip_desc.blend.depth_format = SG_PIXELFORMAT_NONE;
sokol_gfx.upscale_draw_state.pipeline = sg_make_pipeline(&pip_desc);
/* a texture with the emulator's raw pixel data */ /* a texture with the pixel data */
sokol_gfx.upscale_draw_state.fs_images[0] = sg_make_image(&(sg_image_desc){ sokol_gfx.draw_state.fs_images[0] = sg_make_image(&(sg_image_desc){
.width = sokol_gfx.fb_width, .width = sokol_gfx.fb_width,
.height = sokol_gfx.fb_height, .height = sokol_gfx.fb_height,
.pixel_format = SG_PIXELFORMAT_RGBA8, .pixel_format = SG_PIXELFORMAT_RGBA8,
@ -172,28 +164,8 @@ void sokol_gfx_init(int w, int h, int sx, int sy, bool integer_scale, bool portr
.wrap_u = SG_WRAP_CLAMP_TO_EDGE, .wrap_u = SG_WRAP_CLAMP_TO_EDGE,
.wrap_v = SG_WRAP_CLAMP_TO_EDGE .wrap_v = SG_WRAP_CLAMP_TO_EDGE
}); });
/* a 2x upscaled render-target-texture */
sokol_gfx.draw_state.fs_images[0] = sg_make_image(&(sg_image_desc){
.render_target = true,
.width = 2*sokol_gfx.fb_width,
.height = 2*sokol_gfx.fb_height,
.pixel_format = SG_PIXELFORMAT_RGBA8,
.min_filter = SG_FILTER_NEAREST,
.mag_filter = SG_FILTER_NEAREST,
.wrap_u = SG_WRAP_CLAMP_TO_EDGE,
.wrap_v = SG_WRAP_CLAMP_TO_EDGE
});
/* a render pass for the 2x upscaling */
sokol_gfx.upscale_pass = sg_make_pass(&(sg_pass_desc){
.color_attachments[0].image = sokol_gfx.draw_state.fs_images[0]
});
} }
static const sg_pass_action gfx_upscale_pass_action = {
.colors[0] = { .action = SG_ACTION_DONTCARE }
};
static const sg_pass_action gfx_draw_pass_action = { static const sg_pass_action gfx_draw_pass_action = {
.colors[0] = { .action = SG_ACTION_CLEAR, .val = { 0.05f, 0.05f, 0.05f, 1.0f } } .colors[0] = { .action = SG_ACTION_CLEAR, .val = { 0.05f, 0.05f, 0.05f, 1.0f } }
}; };
@ -244,21 +216,15 @@ static void apply_viewport(void) {
void sokol_gfx_draw(const uint32_t* ptr) { void sokol_gfx_draw(const uint32_t* ptr) {
/* copy emulator pixel data into upscaling source texture */ /* copy pixel data into the source texture */
sg_update_image(sokol_gfx.upscale_draw_state.fs_images[0], &(sg_image_content){ sg_update_image(sokol_gfx.draw_state.fs_images[0], &(sg_image_content){
.subimage[0][0] = { .subimage[0][0] = {
.ptr = ptr, .ptr = ptr,
.size = sokol_gfx.fb_width*sokol_gfx.fb_height*sizeof ptr[0] .size = sokol_gfx.fb_width*sokol_gfx.fb_height*sizeof ptr[0]
} }
}); });
/* upscale the original framebuffer 2x with nearest filtering */ /* draw to the screen */
sg_begin_pass(sokol_gfx.upscale_pass, &gfx_upscale_pass_action);
sg_apply_draw_state(&sokol_gfx.upscale_draw_state);
sg_draw(0, 4, 1);
sg_end_pass();
/* draw the final pass with linear filtering */
sg_begin_default_pass(&gfx_draw_pass_action, sapp_width(), sapp_height()); sg_begin_default_pass(&gfx_draw_pass_action, sapp_width(), sapp_height());
apply_viewport(); apply_viewport();
sg_apply_draw_state(&sokol_gfx.draw_state); sg_apply_draw_state(&sokol_gfx.draw_state);