Move OpenGL runtime classification into renderer backend

CMakeLists.txt

@@ -180,6 +180,17 @@ if(PP_ENABLE_OPENGL)
             pp_project_options
         PRIVATE
             pp_project_warnings)
+    if(EMSCRIPTEN)
+        target_compile_definitions(pp_renderer_gl PRIVATE
+            PP_RENDERER_GL_RUNTIME_GLES=1
+            PP_RENDERER_GL_RUNTIME_WEB=1)
+    elseif(ANDROID OR CMAKE_SYSTEM_NAME STREQUAL "iOS")
+        target_compile_definitions(pp_renderer_gl PRIVATE
+            PP_RENDERER_GL_RUNTIME_GLES=1)
+    else()
+        target_compile_definitions(pp_renderer_gl PRIVATE
+            PP_RENDERER_GL_RUNTIME_DESKTOP=1)
+    endif()
 endif()
 
 add_library(pp_paint_renderer STATIC

docs/modernization/build-inventory.md

@@ -788,6 +788,10 @@ Known warnings after the current CMake app build:
   the retained OpenGL runtime classes still include legacy app/engine headers
   and are still consumed directly by canvas and UI classes. It should become a
   normal backend library once those call sites depend on `pp_renderer_api`.
+  `pp_renderer_gl` now owns OpenGL runtime build-target classification through
+  CMake target compile definitions and `opengl_runtime_for_current_build()`,
+  so app shader startup asks the backend for desktop GL/GLES/WebGL policy
+  instead of carrying local platform branches.
 - `pp_legacy_ui_core` is an object-library containment boundary because the
   retained base `Node` controls still depend on legacy renderer and app
   headers. It should shrink as layout parsing, colors, generic controls, and

docs/modernization/roadmap.md

@@ -672,6 +672,10 @@ Default canvas allocation size now dispatches through `PlatformServices`, so
 1536 and WebGL 512 defaults without carrying the old `CANVAS_RES` platform
 macro in `canvas.h`; DEBT-0057 tracks moving the retained WebGL policy branch
 out of the legacy fallback when the Web shell owns injected services.
+OpenGL runtime build-target classification now lives in `pp_renderer_gl`
+through CMake-owned compile definitions and
+`opengl_runtime_for_current_build()`, so `app_shaders.cpp` no longer decides
+desktop GL/GLES/WebGL capability policy with local platform branches.
 Prepared-file save/download handoff is now also part of the service contract,
 so iOS/Web export completion routes through `PlatformServices` after the app
 writes the temporary/exported payload.

src/app_shaders.cpp

@@ -50,16 +50,7 @@ void App::initShaders()
             LOG("EXT: %s", extension_storage.back().c_str());
         }
 
-        pp::renderer::gl::OpenGlRuntime runtime;
-#if __GL__
-        runtime.desktop_gl = true;
-#endif
-#if __GLES__
-        runtime.gles = true;
-#endif
-#if __WEB__
-        runtime.web = true;
-#endif
+        const auto runtime = pp::renderer::gl::opengl_runtime_for_current_build();
         const auto capabilities = pp::renderer::gl::detect_opengl_capabilities(extension_views, runtime);
         ShaderManager::ext_framebuffer_fetch = capabilities.framebuffer_fetch;
         ShaderManager::ext_map_aligned = capabilities.map_buffer_alignment;
@@ -69,12 +60,12 @@ void App::initShaders()
         ShaderManager::set_render_device_features(pp::renderer::gl::render_device_features(capabilities));
     });
     
-#if __GL__
-    // In OpenGL 3.3 these should be already available
-    ShaderManager::ext_float32_linear = true;
-    ShaderManager::ext_float32 = true;
-    ShaderManager::ext_float16 = true;
-#endif
+    if (pp::renderer::gl::opengl_runtime_for_current_build().desktop_gl) {
+        // In OpenGL 3.3 these should be already available.
+        ShaderManager::ext_float32_linear = true;
+        ShaderManager::ext_float32 = true;
+        ShaderManager::ext_float16 = true;
+    }
     ShaderManager::set_render_device_features(
         pp::renderer::gl::render_device_features(shader_manager_capabilities()));
 

src/renderer_gl/opengl_capabilities.cpp

@@ -201,6 +201,21 @@ OpenGlCapabilities detect_opengl_capabilities(
     return capabilities;
 }
 
+OpenGlRuntime opengl_runtime_for_current_build() noexcept
+{
+    OpenGlRuntime runtime;
+#if defined(PP_RENDERER_GL_RUNTIME_DESKTOP)
+    runtime.desktop_gl = true;
+#endif
+#if defined(PP_RENDERER_GL_RUNTIME_GLES)
+    runtime.gles = true;
+#endif
+#if defined(PP_RENDERER_GL_RUNTIME_WEB)
+    runtime.web = true;
+#endif
+    return runtime;
+}
+
 pp::renderer::RenderDeviceFeatures render_device_features(OpenGlCapabilities capabilities) noexcept
 {
     return pp::renderer::RenderDeviceFeatures {

src/renderer_gl/opengl_capabilities.h

@@ -678,6 +678,7 @@ struct OpenGlMeshDeleteDispatch {
 [[nodiscard]] OpenGlCapabilities detect_opengl_capabilities(
     std::span<const std::string_view> extensions,
     OpenGlRuntime runtime) noexcept;
+[[nodiscard]] OpenGlRuntime opengl_runtime_for_current_build() noexcept;
 [[nodiscard]] pp::renderer::RenderDeviceFeatures render_device_features(
     OpenGlCapabilities capabilities) noexcept;
 [[nodiscard]] OpenGlInitialState panopainter_initial_state() noexcept;

tests/renderer_gl/capabilities_tests.cpp

@@ -1035,6 +1035,16 @@ void ignores_gles_texture_extensions_for_webgl_runtime(pp::tests::Harness& h)
     PP_EXPECT(h, !capabilities.float16_textures);
 }
 
+void classifies_current_build_opengl_runtime(pp::tests::Harness& h)
+{
+    const auto runtime = pp::renderer::gl::opengl_runtime_for_current_build();
+
+    PP_EXPECT(h, runtime.desktop_gl || runtime.gles);
+    PP_EXPECT(h, !(runtime.desktop_gl && runtime.gles));
+    if (runtime.web)
+        PP_EXPECT(h, runtime.gles);
+}
+
 void selects_texture_upload_type_from_internal_format(pp::tests::Harness& h)
 {
     constexpr std::uint32_t gl_unsigned_byte = 0x1401U;
@@ -4092,6 +4102,7 @@ int main()
     harness.run("treats_desktop_gl_float_rendering_as_core", treats_desktop_gl_float_rendering_as_core);
     harness.run("detects_gles_texture_float_extensions", detects_gles_texture_float_extensions);
     harness.run("ignores_gles_texture_extensions_for_webgl_runtime", ignores_gles_texture_extensions_for_webgl_runtime);
+    harness.run("classifies_current_build_opengl_runtime", classifies_current_build_opengl_runtime);
     harness.run("selects_texture_upload_type_from_internal_format", selects_texture_upload_type_from_internal_format);
     harness.run("maps_image_channel_count_to_texture_format", maps_image_channel_count_to_texture_format);
     harness.run("maps_renderer_texture_formats_to_opengl_tokens", maps_renderer_texture_formats_to_opengl_tokens);