Share retained framebuffer dispatch bridge

src/legacy_gl_framebuffer_dispatch.h

@@ -0,0 +1,161 @@
+#pragma once
+
+#include <cstdint>
+
+#include "legacy_gl_texture_dispatch.h"
+#include "renderer_gl/opengl_capabilities.h"
+
+namespace pp::legacy::gl_framebuffer {
+
+inline void query_opengl_integer(std::uint32_t name, std::int32_t* value) noexcept
+{
+    glGetIntegerv(static_cast<GLenum>(name), reinterpret_cast<GLint*>(value));
+}
+
+inline void gen_opengl_framebuffers(std::uint32_t count, std::uint32_t* ids) noexcept
+{
+    glGenFramebuffers(static_cast<GLsizei>(count), reinterpret_cast<GLuint*>(ids));
+}
+
+inline void delete_opengl_framebuffers(std::uint32_t count, const std::uint32_t* ids) noexcept
+{
+    glDeleteFramebuffers(static_cast<GLsizei>(count), reinterpret_cast<const GLuint*>(ids));
+}
+
+inline void bind_opengl_framebuffer(std::uint32_t target, std::uint32_t framebuffer) noexcept
+{
+    glBindFramebuffer(static_cast<GLenum>(target), static_cast<GLuint>(framebuffer));
+}
+
+inline void attach_opengl_framebuffer_texture_2d(
+    std::uint32_t target,
+    std::uint32_t attachment,
+    std::uint32_t texture_target,
+    std::uint32_t texture,
+    std::int32_t level) noexcept
+{
+    glFramebufferTexture2D(
+        static_cast<GLenum>(target),
+        static_cast<GLenum>(attachment),
+        static_cast<GLenum>(texture_target),
+        static_cast<GLuint>(texture),
+        static_cast<GLint>(level));
+}
+
+inline std::uint32_t check_opengl_framebuffer_status(std::uint32_t target) noexcept
+{
+    return static_cast<std::uint32_t>(glCheckFramebufferStatus(static_cast<GLenum>(target)));
+}
+
+inline void blit_opengl_framebuffer(
+    std::int32_t source_x0,
+    std::int32_t source_y0,
+    std::int32_t source_x1,
+    std::int32_t source_y1,
+    std::int32_t destination_x0,
+    std::int32_t destination_y0,
+    std::int32_t destination_x1,
+    std::int32_t destination_y1,
+    std::uint32_t mask,
+    std::uint32_t filter) noexcept
+{
+    glBlitFramebuffer(
+        static_cast<GLint>(source_x0),
+        static_cast<GLint>(source_y0),
+        static_cast<GLint>(source_x1),
+        static_cast<GLint>(source_y1),
+        static_cast<GLint>(destination_x0),
+        static_cast<GLint>(destination_y0),
+        static_cast<GLint>(destination_x1),
+        static_cast<GLint>(destination_y1),
+        static_cast<GLbitfield>(mask),
+        static_cast<GLenum>(filter));
+}
+
+inline void read_opengl_pixels(
+    std::int32_t x,
+    std::int32_t y,
+    std::int32_t width,
+    std::int32_t height,
+    std::uint32_t pixel_format,
+    std::uint32_t component_type,
+    void* pixels) noexcept
+{
+    glReadPixels(
+        static_cast<GLint>(x),
+        static_cast<GLint>(y),
+        static_cast<GLsizei>(width),
+        static_cast<GLsizei>(height),
+        static_cast<GLenum>(pixel_format),
+        static_cast<GLenum>(component_type),
+        pixels);
+}
+
+inline pp::renderer::gl::OpenGlTexture2DReadbackDispatch texture_2d_readback_dispatch() noexcept
+{
+    return pp::renderer::gl::OpenGlTexture2DReadbackDispatch {
+        .bind_texture = pp::legacy::gl_texture::bind_opengl_texture,
+        .gen_framebuffers = gen_opengl_framebuffers,
+        .get_integer = query_opengl_integer,
+        .bind_framebuffer = bind_opengl_framebuffer,
+        .framebuffer_texture_2d = attach_opengl_framebuffer_texture_2d,
+        .check_framebuffer_status = check_opengl_framebuffer_status,
+        .read_pixels = read_opengl_pixels,
+        .delete_framebuffers = delete_opengl_framebuffers,
+    };
+}
+
+inline pp::renderer::gl::OpenGlFramebufferBlitDispatch framebuffer_blit_dispatch() noexcept
+{
+    return pp::renderer::gl::OpenGlFramebufferBlitDispatch {
+        .get_integer = query_opengl_integer,
+        .bind_framebuffer = bind_opengl_framebuffer,
+        .blit_framebuffer = blit_opengl_framebuffer,
+    };
+}
+
+inline pp::renderer::gl::OpenGlFramebufferReadbackDispatch framebuffer_readback_dispatch() noexcept
+{
+    return pp::renderer::gl::OpenGlFramebufferReadbackDispatch {
+        .get_integer = query_opengl_integer,
+        .bind_framebuffer = bind_opengl_framebuffer,
+        .read_pixels = read_opengl_pixels,
+    };
+}
+
+inline pp::renderer::gl::OpenGlFramebufferBindDispatch framebuffer_bind_dispatch() noexcept
+{
+    return pp::renderer::gl::OpenGlFramebufferBindDispatch {
+        .get_integer = query_opengl_integer,
+        .bind_framebuffer = bind_opengl_framebuffer,
+    };
+}
+
+inline pp::renderer::gl::OpenGlFramebufferRestoreDispatch framebuffer_restore_dispatch() noexcept
+{
+    return pp::renderer::gl::OpenGlFramebufferRestoreDispatch {
+        .bind_framebuffer = bind_opengl_framebuffer,
+    };
+}
+
+inline pp::renderer::gl::OpenGlFramebufferDeleteDispatch framebuffer_delete_dispatch() noexcept
+{
+    return pp::renderer::gl::OpenGlFramebufferDeleteDispatch {
+        .delete_framebuffers = delete_opengl_framebuffers,
+    };
+}
+
+inline pp::renderer::gl::OpenGlRenderTargetFramebufferAllocationDispatch render_target_allocation_dispatch(
+    pp::renderer::gl::OpenGlFramebufferRenderbufferFn framebuffer_renderbuffer) noexcept
+{
+    return pp::renderer::gl::OpenGlRenderTargetFramebufferAllocationDispatch {
+        .gen_framebuffers = gen_opengl_framebuffers,
+        .get_integer = query_opengl_integer,
+        .bind_framebuffer = bind_opengl_framebuffer,
+        .framebuffer_texture_2d = attach_opengl_framebuffer_texture_2d,
+        .framebuffer_renderbuffer = framebuffer_renderbuffer,
+        .check_framebuffer_status = check_opengl_framebuffer_status,
+    };
+}
+
+} // namespace pp::legacy::gl_framebuffer