Map renderer viewport and scissor to OpenGL

src/renderer_gl/opengl_capabilities.cpp

@@ -669,6 +669,18 @@ std::uint32_t viewport_query() noexcept
     return gl_viewport;
 }
 
+OpenGlViewportRect viewport_for_renderer_viewport(pp::renderer::Viewport viewport) noexcept
+{
+    return OpenGlViewportRect {
+        .x = viewport.x,
+        .y = viewport.y,
+        .width = static_cast<std::int32_t>(viewport.width),
+        .height = static_cast<std::int32_t>(viewport.height),
+        .min_depth = viewport.min_depth,
+        .max_depth = viewport.max_depth,
+    };
+}
+
 std::uint32_t color_clear_value_query() noexcept
 {
     return gl_color_clear_value;
@@ -749,6 +761,17 @@ std::uint32_t scissor_test_state() noexcept
     return gl_scissor_test;
 }
 
+OpenGlScissorRect scissor_rect_for_renderer_scissor(pp::renderer::ScissorRect scissor) noexcept
+{
+    return OpenGlScissorRect {
+        .enabled = scissor.enabled ? gl_boolean_true : gl_boolean_false,
+        .x = scissor.x,
+        .y = scissor.y,
+        .width = static_cast<std::int32_t>(scissor.width),
+        .height = static_cast<std::int32_t>(scissor.height),
+    };
+}
+
 std::uint32_t program_point_size_state() noexcept
 {
     return gl_program_point_size;

src/renderer_gl/opengl_capabilities.h

@@ -34,6 +34,23 @@ struct OpenGlTextureParameter {
     std::uint32_t value = 0;
 };
 
+struct OpenGlViewportRect {
+    std::int32_t x = 0;
+    std::int32_t y = 0;
+    std::int32_t width = 0;
+    std::int32_t height = 0;
+    float min_depth = 0.0F;
+    float max_depth = 1.0F;
+};
+
+struct OpenGlScissorRect {
+    std::uint8_t enabled = 0;
+    std::int32_t x = 0;
+    std::int32_t y = 0;
+    std::int32_t width = 0;
+    std::int32_t height = 0;
+};
+
 struct OpenGlEnumMapping {
     std::uint32_t value = 0;
     bool supported = false;
@@ -158,6 +175,8 @@ struct OpenGlWindowsWglContextConfig {
 [[nodiscard]] std::uint32_t renderer_string_name() noexcept;
 [[nodiscard]] std::uint32_t shading_language_version_string_name() noexcept;
 [[nodiscard]] std::uint32_t viewport_query() noexcept;
+[[nodiscard]] OpenGlViewportRect viewport_for_renderer_viewport(
+    pp::renderer::Viewport viewport) noexcept;
 [[nodiscard]] std::uint32_t color_clear_value_query() noexcept;
 [[nodiscard]] std::uint32_t current_program_query() noexcept;
 [[nodiscard]] std::uint32_t active_texture_query() noexcept;
@@ -171,6 +190,8 @@ struct OpenGlWindowsWglContextConfig {
 [[nodiscard]] OpenGlDepthState depth_state_for_renderer_depth_state(
     pp::renderer::DepthState state) noexcept;
 [[nodiscard]] std::uint32_t scissor_test_state() noexcept;
+[[nodiscard]] OpenGlScissorRect scissor_rect_for_renderer_scissor(
+    pp::renderer::ScissorRect scissor) noexcept;
 [[nodiscard]] std::uint32_t program_point_size_state() noexcept;
 [[nodiscard]] std::uint32_t line_smooth_state() noexcept;
 [[nodiscard]] std::uint32_t source_alpha_blend_factor() noexcept;