Map renderer texture formats to OpenGL

src/renderer_gl/opengl_capabilities.cpp

@@ -68,6 +68,9 @@ constexpr std::uint32_t gl_rgb8 = 0x8051U;
 constexpr std::uint32_t gl_rgba8 = 0x8058U;
 constexpr std::uint32_t gl_rgba32f = 0x8814U;
 constexpr std::uint32_t gl_rgba16f = 0x881AU;
+constexpr std::uint32_t gl_depth_stencil = 0x84F9U;
+constexpr std::uint32_t gl_unsigned_int_24_8 = 0x84FAU;
+constexpr std::uint32_t gl_depth24_stencil8 = 0x88F0U;
 constexpr std::uint32_t gl_texture_2d = 0x0DE1U;
 constexpr std::uint32_t gl_renderbuffer = 0x8D41U;
 constexpr std::uint32_t gl_depth_component24 = 0x81A6U;
@@ -262,6 +265,35 @@ OpenGlPixelFormat texture_format_for_channel_count(std::uint32_t channel_count)
     }
 }
 
+OpenGlRendererTextureFormat texture_format_for_renderer_format(pp::renderer::TextureFormat format) noexcept
+{
+    switch (format) {
+    case pp::renderer::TextureFormat::rgba8:
+        return OpenGlRendererTextureFormat {
+            .internal_format = gl_rgba8,
+            .pixel_format = gl_rgba,
+            .component_type = gl_unsigned_byte,
+            .bytes_per_pixel = 4U,
+        };
+    case pp::renderer::TextureFormat::r8:
+        return OpenGlRendererTextureFormat {
+            .internal_format = gl_r8,
+            .pixel_format = gl_red,
+            .component_type = gl_unsigned_byte,
+            .bytes_per_pixel = 1U,
+        };
+    case pp::renderer::TextureFormat::depth24_stencil8:
+        return OpenGlRendererTextureFormat {
+            .internal_format = gl_depth24_stencil8,
+            .pixel_format = gl_depth_stencil,
+            .component_type = gl_unsigned_int_24_8,
+            .bytes_per_pixel = 4U,
+        };
+    default:
+        return OpenGlRendererTextureFormat {};
+    }
+}
+
 OpenGlReadbackFormat rgba8_readback_format() noexcept
 {
     return OpenGlReadbackFormat {

src/renderer_gl/opengl_capabilities.h

@@ -40,6 +40,13 @@ struct OpenGlReadbackFormat {
     std::uint32_t bytes_per_pixel = 0;
 };
 
+struct OpenGlRendererTextureFormat {
+    std::uint32_t internal_format = 0;
+    std::uint32_t pixel_format = 0;
+    std::uint32_t component_type = 0;
+    std::uint32_t bytes_per_pixel = 0;
+};
+
 struct OpenGlWindowsWglContextConfig {
     std::array<std::int32_t, 9> context_attributes {};
     std::array<std::int32_t, 15> pixel_format_attributes {};
@@ -59,6 +66,8 @@ struct OpenGlWindowsWglContextConfig {
 [[nodiscard]] std::uint32_t unsigned_byte_component_type() noexcept;
 [[nodiscard]] std::uint32_t rgba_pixel_format() noexcept;
 [[nodiscard]] OpenGlPixelFormat texture_format_for_channel_count(std::uint32_t channel_count) noexcept;
+[[nodiscard]] OpenGlRendererTextureFormat texture_format_for_renderer_format(
+    pp::renderer::TextureFormat format) noexcept;
 [[nodiscard]] OpenGlReadbackFormat rgba8_readback_format() noexcept;
 [[nodiscard]] OpenGlReadbackFormat rgba32f_readback_format() noexcept;
 [[nodiscard]] std::uint64_t readback_byte_count(