new customresolve sample wip

sapp/CMakeLists.txt

@@ -314,6 +314,20 @@ fips_begin_app(shared-bindings-sapp-ui windowed)
     target_compile_definitions(shared-bindings-sapp-ui PRIVATE USE_DBG_UI)
 fips_end_app()
 
+fips_ide_group(Samples)
+fips_begin_app(customresolve-sapp windowed)
+    fips_files(customresolve-sapp.c)
+    sokol_shader(customresolve-sapp.glsl ${slang})
+    fips_deps(sokol)
+fips_end_app()
+fips_ide_group(SamplesWithDebugUI)
+fips_begin_app(customresolve-sapp-ui windowed)
+    fips_files(customresolve-sapp.c)
+    sokol_shader(customresolve-sapp.glsl ${slang})
+    fips_deps(sokol dbgui)
+    target_compile_options(customresolve-sapp-ui PRIVATE USE_DBG_UI)
+fips_end_app()
+
 fips_ide_group(Samples)
 fips_begin_app(mipmap-sapp windowed)
     fips_files(mipmap-sapp.c)

sapp/customresolve-sapp.c

@@ -0,0 +1,95 @@
+//------------------------------------------------------------------------------
+//  customresolve-sapp.c
+//
+//  Demonstrate custom MSAA resolve in a render pass which reads individual
+//  MSAA samples in the fragment shader.
+//------------------------------------------------------------------------------
+#include "sokol_app.h"
+#include "sokol_gfx.h"
+#include "sokol_log.h"
+#include "sokol_glue.h"
+#include "dbgui/dbgui.h"
+#include "customresolve-sapp.glsl.h"
+
+static struct {
+    struct {
+        sg_image img;
+        sg_pipeline pip;
+    } msaa;
+    struct {
+        sg_image img;
+        sg_pipeline pip;
+        sg_attachments att;
+    } resolve;
+    struct {
+        sg_pipeline pip;
+    } display;
+} state;
+
+static void init(void) {
+    sg_setup(&(sg_desc){
+        .environment = sglue_environment(),
+        .logger.func = slog_func,
+    });
+    __dbgui_setup(sapp_sample_count());
+
+    state.msaa.img = sg_make_image(&(sg_image_desc){
+        .width = 160,
+        .height = 120,
+        .pixel_format = SG_PIXELFORMAT_RGBA8,
+        .sample_count = 4,
+        .label = "msaa image",
+    });
+
+    state.resolve.img = sg_make_image(&(sg_image_desc){
+        .width = 160,
+        .height = 120,
+        .pixel_format = SG_PIXELFORMAT_RGBA8,
+        .sample_count = 1,
+        .label = "resolve image",
+    });
+
+    state.msaa.pip = sg_make_pipeline(&(sg_pipeline_desc){
+        .shader = sg_make_shader(msaa_shader_desc(sg_query_backend())),
+        .sample_count = 4,
+        .colors[0].pixel_format = SG_PIXELFORMAT_RGBA8,
+        .label = "msaa pipeline",
+    });
+
+    state.resolve.pip = sg_make_pipeline(&(sg_pipeline_desc){
+        .shader = sg_make_shader(resolve_shader_desc(sg_query_backend())),
+        .sample_count = 1,
+        .colors[0].pixel_format = SG_PIXELFORMAT_RGBA8,
+        .label = "resolve pipeline",
+    });
+
+    state.display.pip = sg_make_pipeline(&(sg_pipeline_desc){
+        .shader = sg_make_shader(display_shader_desc(sg_query_backend())),
+        .label = "display pipeline",
+    });
+}
+
+static void frame(void) {
+
+}
+
+static void cleanup(void) {
+    __dbgui_shutdown();
+    sg_shutdown();
+}
+
+sapp_desc sokol_main(int argc, char* argv[]) {
+    (void)argc; (void)argv;
+    return (sapp_desc){
+        .init_cb = init,
+        .frame_cb = frame,
+        .cleanup_cb = cleanup,
+        .event_cb = __dbgui_event,
+        .width = 640,
+        .height = 480,
+        .sample_count = 1,
+        .window_title = "customresolve-sapp.c",
+        .icon.sokol_default = true,
+        .logger.func = slog_func,
+    };
+}

sapp/customresolve-sapp.glsl

@@ -0,0 +1,31 @@
+@vs triangle_vs
+
+const vec4 colors[3] = {
+    vec4(1, 1, 0, 1),
+    vec4(0, 1, 1, 1),
+    vec4(1, 0, 1, 1),
+};
+const vec3 positions[3] = {
+    vec3(0.0, 0.5, 0.5),
+    vec3(0.5, -0.5, 0.5),
+    vec3(-0.5, -0.5, 0.5),
+};
+
+out vec4 color;
+
+void main() {
+    gl_Position = vec4(positions[gl_VertexIndex], 1.0);
+    color = colors[gl_VertexIndex];
+}
+@end
+
+@fs triangle_fs
+in vec4 color;
+out vec4 frag_color;
+
+void main() {
+    frag_color = color;
+}
+@end
+
+@program msaa triangle_vs triangle_fs