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Route RTT blit readback through renderer GL

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This commit is contained in:
omigamedev
2026-06-03 06:31:41 +02:00
parent ae69f7437f
commit 3128a0d309
6 changed files with 487 additions and 73 deletions
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76
src/renderer_gl/opengl_capabilities.cpp
View File

@@ -608,6 +608,82 @@ pp::foundation::Result<OpenGlTexture2DReadbackResult> readback_opengl_texture_2d
return pp::foundation::Result<OpenGlTexture2DReadbackResult>::success(result);
}
pp::foundation::Status blit_opengl_framebuffer(
OpenGlFramebufferBlit blit,
OpenGlFramebufferBlitDispatch dispatch) noexcept
{
if (dispatch.get_integer == nullptr
|| dispatch.bind_framebuffer == nullptr
|| dispatch.blit_framebuffer == nullptr) {
return pp::foundation::Status::invalid_argument("OpenGL framebuffer blit dispatch callbacks must not be null");
}
if (blit.source_rect.x1 <= blit.source_rect.x0
|| blit.source_rect.y1 <= blit.source_rect.y0
|| blit.destination_rect.x1 <= blit.destination_rect.x0
|| blit.destination_rect.y1 <= blit.destination_rect.y0
|| blit.mask == 0U
|| blit.filter == 0U) {
return pp::foundation::Status::invalid_argument("OpenGL framebuffer blit parameters are invalid");
}
std::int32_t previous_draw_framebuffer = 0;
std::int32_t previous_read_framebuffer = 0;
dispatch.get_integer(draw_framebuffer_binding_query(), &previous_draw_framebuffer);
dispatch.get_integer(read_framebuffer_binding_query(), &previous_read_framebuffer);
dispatch.bind_framebuffer(draw_framebuffer_target(), blit.destination_framebuffer);
dispatch.bind_framebuffer(read_framebuffer_target(), blit.source_framebuffer);
dispatch.blit_framebuffer(
blit.source_rect.x0,
blit.source_rect.y0,
blit.source_rect.x1,
blit.source_rect.y1,
blit.destination_rect.x0,
blit.destination_rect.y0,
blit.destination_rect.x1,
blit.destination_rect.y1,
blit.mask,
blit.filter);
dispatch.bind_framebuffer(draw_framebuffer_target(), static_cast<std::uint32_t>(previous_draw_framebuffer));
dispatch.bind_framebuffer(read_framebuffer_target(), static_cast<std::uint32_t>(previous_read_framebuffer));
return pp::foundation::Status::success();
}
pp::foundation::Status readback_opengl_framebuffer(
OpenGlFramebufferReadback readback,
OpenGlFramebufferReadbackDispatch dispatch) noexcept
{
if (dispatch.get_integer == nullptr
|| dispatch.bind_framebuffer == nullptr
|| dispatch.read_pixels == nullptr) {
return pp::foundation::Status::invalid_argument(
"OpenGL framebuffer readback dispatch callbacks must not be null");
}
if (readback.width <= 0
|| readback.height <= 0
|| readback.format.pixel_format == 0U
|| readback.format.component_type == 0U
|| readback.format.bytes_per_pixel == 0U
|| readback.pixels == nullptr) {
return pp::foundation::Status::invalid_argument("OpenGL framebuffer readback parameters are invalid");
}
std::int32_t previous_read_framebuffer = 0;
dispatch.get_integer(read_framebuffer_binding_query(), &previous_read_framebuffer);
dispatch.bind_framebuffer(read_framebuffer_target(), readback.framebuffer);
dispatch.read_pixels(
readback.x,
readback.y,
readback.width,
readback.height,
readback.format.pixel_format,
readback.format.component_type,
readback.pixels);
dispatch.bind_framebuffer(read_framebuffer_target(), static_cast<std::uint32_t>(previous_read_framebuffer));
return pp::foundation::Status::success();
}
std::uint32_t extension_count_query() noexcept
{
return gl_num_extensions;

55
src/renderer_gl/opengl_capabilities.h
View File

@@ -141,6 +141,32 @@ struct OpenGlTexture2DReadbackResult {
bool pixels_read = false;
};
struct OpenGlFramebufferRect {
std::int32_t x0 = 0;
std::int32_t y0 = 0;
std::int32_t x1 = 0;
std::int32_t y1 = 0;
};
struct OpenGlFramebufferBlit {
std::uint32_t source_framebuffer = 0;
std::uint32_t destination_framebuffer = 0;
OpenGlFramebufferRect source_rect;
OpenGlFramebufferRect destination_rect;
std::uint32_t mask = 0;
std::uint32_t filter = 0;
};
struct OpenGlFramebufferReadback {
std::uint32_t framebuffer = 0;
std::int32_t x = 0;
std::int32_t y = 0;
std::int32_t width = 0;
std::int32_t height = 0;
OpenGlReadbackFormat format;
void* pixels = nullptr;
};
struct OpenGlWindowsWglContextConfig {
std::array<std::int32_t, 9> context_attributes {};
std::array<std::int32_t, 15> pixel_format_attributes {};
@@ -223,6 +249,17 @@ using OpenGlReadPixelsFn = void (*)(
std::uint32_t pixel_format,
std::uint32_t component_type,
void* pixels) noexcept;
using OpenGlBlitFramebufferFn = void (*)(
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;
struct OpenGlStateDispatch {
OpenGlCapabilityFn enable = nullptr;
@@ -332,6 +369,18 @@ struct OpenGlTexture2DReadbackDispatch {
OpenGlDeleteObjectsFn delete_framebuffers = nullptr;
};
struct OpenGlFramebufferBlitDispatch {
OpenGlGetIntegerFn get_integer = nullptr;
OpenGlBindFramebufferFn bind_framebuffer = nullptr;
OpenGlBlitFramebufferFn blit_framebuffer = nullptr;
};
struct OpenGlFramebufferReadbackDispatch {
OpenGlGetIntegerFn get_integer = nullptr;
OpenGlBindFramebufferFn bind_framebuffer = nullptr;
OpenGlReadPixelsFn read_pixels = nullptr;
};
[[nodiscard]] OpenGlCapabilities detect_opengl_capabilities(
std::span<const std::string_view> extensions,
OpenGlRuntime runtime) noexcept;
@@ -382,6 +431,12 @@ struct OpenGlTexture2DReadbackDispatch {
[[nodiscard]] pp::foundation::Result<OpenGlTexture2DReadbackResult> readback_opengl_texture_2d(
OpenGlTexture2DReadback readback,
OpenGlTexture2DReadbackDispatch dispatch) noexcept;
[[nodiscard]] pp::foundation::Status blit_opengl_framebuffer(
OpenGlFramebufferBlit blit,
OpenGlFramebufferBlitDispatch dispatch) noexcept;
[[nodiscard]] pp::foundation::Status readback_opengl_framebuffer(
OpenGlFramebufferReadback readback,
OpenGlFramebufferReadbackDispatch dispatch) noexcept;
[[nodiscard]] std::uint32_t extension_count_query() noexcept;
[[nodiscard]] std::uint32_t extension_string_name() noexcept;