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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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220
src/rtt.cpp
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@@ -44,6 +44,60 @@ namespace {
return static_cast<GLenum>(pp::renderer::gl::read_framebuffer_binding_query());
}
void query_opengl_integer(std::uint32_t name, std::int32_t* value) noexcept
{
glGetIntegerv(static_cast<GLenum>(name), reinterpret_cast<GLint*>(value));
}
void bind_opengl_framebuffer(std::uint32_t target, std::uint32_t framebuffer) noexcept
{
glBindFramebuffer(static_cast<GLenum>(target), static_cast<GLuint>(framebuffer));
}
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));
}
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);
}
}
RTT& RTT::operator=(RTT&& other)
@@ -112,9 +166,6 @@ bool RTT::resize(int width, int height)
App::I->render_task([&]
{
glGetIntegerv(draw_framebuffer_binding_query(), &oldDFboID);
glGetIntegerv(read_framebuffer_binding_query(), &oldRFboID);
ret = new_rtt.create(width, height, -1, int_fmt, rboID != 0);
if (!ret)
{
@@ -122,22 +173,28 @@ bool RTT::resize(int width, int height)
return;
}
glBindFramebuffer(draw_framebuffer_target(), new_rtt.fboID);
glBindFramebuffer(read_framebuffer_target(), fboID);
glBlitFramebuffer(
0,
0,
w,
h,
0,
0,
new_rtt.w,
new_rtt.h,
static_cast<GLbitfield>(pp::renderer::gl::framebuffer_color_buffer_mask()),
static_cast<GLenum>(pp::renderer::gl::framebuffer_blit_filter(true)));
glBindFramebuffer(draw_framebuffer_target(), oldDFboID);
glBindFramebuffer(read_framebuffer_target(), oldRFboID);
const auto status = pp::renderer::gl::blit_opengl_framebuffer(
pp::renderer::gl::OpenGlFramebufferBlit {
.source_framebuffer = static_cast<std::uint32_t>(fboID),
.destination_framebuffer = static_cast<std::uint32_t>(new_rtt.fboID),
.source_rect = pp::renderer::gl::OpenGlFramebufferRect { .x1 = w, .y1 = h },
.destination_rect = pp::renderer::gl::OpenGlFramebufferRect {
.x1 = new_rtt.w,
.y1 = new_rtt.h,
},
.mask = pp::renderer::gl::framebuffer_color_buffer_mask(),
.filter = pp::renderer::gl::framebuffer_blit_filter(true),
},
pp::renderer::gl::OpenGlFramebufferBlitDispatch {
.get_integer = query_opengl_integer,
.bind_framebuffer = bind_opengl_framebuffer,
.blit_framebuffer = blit_opengl_framebuffer,
});
if (!status.ok()) {
LOG("RTT::resize blit failed because: %s", status.message);
ret = false;
return;
}
destroy();
});
@@ -188,19 +245,22 @@ void RTT::copy(const RTT & source)
return;
App::I->render_task([&]
{
GLint old_draw = 0;
GLint old_read = 0;
glGetIntegerv(draw_framebuffer_binding_query(), &old_draw);
glGetIntegerv(read_framebuffer_binding_query(), &old_read);
glBindFramebuffer(draw_framebuffer_target(), fboID);
glBindFramebuffer(read_framebuffer_target(), source.fboID);
glBlitFramebuffer(0, 0, source.w, source.h, 0, 0, w, h,
static_cast<GLbitfield>(pp::renderer::gl::framebuffer_color_buffer_mask()),
static_cast<GLenum>(pp::renderer::gl::framebuffer_blit_filter(true)));
glBindFramebuffer(draw_framebuffer_target(), old_draw);
glBindFramebuffer(read_framebuffer_target(), old_read);
const auto status = pp::renderer::gl::blit_opengl_framebuffer(
pp::renderer::gl::OpenGlFramebufferBlit {
.source_framebuffer = static_cast<std::uint32_t>(source.fboID),
.destination_framebuffer = static_cast<std::uint32_t>(fboID),
.source_rect = pp::renderer::gl::OpenGlFramebufferRect { .x1 = source.w, .y1 = source.h },
.destination_rect = pp::renderer::gl::OpenGlFramebufferRect { .x1 = w, .y1 = h },
.mask = pp::renderer::gl::framebuffer_color_buffer_mask(),
.filter = pp::renderer::gl::framebuffer_blit_filter(true),
},
pp::renderer::gl::OpenGlFramebufferBlitDispatch {
.get_integer = query_opengl_integer,
.bind_framebuffer = bind_opengl_framebuffer,
.blit_framebuffer = blit_opengl_framebuffer,
});
if (!status.ok())
LOG("RTT::copy blit failed because: %s", status.message);
});
}
@@ -211,20 +271,32 @@ void RTT::copy(const RTT& source, const glm::vec4& rect)
App::I->render_task([&]
{
auto r = rect_intersection(rect, { 0, 0, w, h });
GLint old_draw = 0;
GLint old_read = 0;
glGetIntegerv(draw_framebuffer_binding_query(), &old_draw);
glGetIntegerv(read_framebuffer_binding_query(), &old_read);
glBindFramebuffer(draw_framebuffer_target(), fboID);
glBindFramebuffer(read_framebuffer_target(), source.fboID);
glBlitFramebuffer(r.x, r.y, r.z, r.w, r.x, r.y, r.z, r.w,
static_cast<GLbitfield>(pp::renderer::gl::framebuffer_color_buffer_mask()),
static_cast<GLenum>(pp::renderer::gl::framebuffer_blit_filter(false)));
glBindFramebuffer(draw_framebuffer_target(), old_draw);
glBindFramebuffer(read_framebuffer_target(), old_read);
const auto status = pp::renderer::gl::blit_opengl_framebuffer(
pp::renderer::gl::OpenGlFramebufferBlit {
.source_framebuffer = static_cast<std::uint32_t>(source.fboID),
.destination_framebuffer = static_cast<std::uint32_t>(fboID),
.source_rect = pp::renderer::gl::OpenGlFramebufferRect {
.x0 = static_cast<std::int32_t>(r.x),
.y0 = static_cast<std::int32_t>(r.y),
.x1 = static_cast<std::int32_t>(r.z),
.y1 = static_cast<std::int32_t>(r.w),
},
.destination_rect = pp::renderer::gl::OpenGlFramebufferRect {
.x0 = static_cast<std::int32_t>(r.x),
.y0 = static_cast<std::int32_t>(r.y),
.x1 = static_cast<std::int32_t>(r.z),
.y1 = static_cast<std::int32_t>(r.w),
},
.mask = pp::renderer::gl::framebuffer_color_buffer_mask(),
.filter = pp::renderer::gl::framebuffer_blit_filter(false),
},
pp::renderer::gl::OpenGlFramebufferBlitDispatch {
.get_integer = query_opengl_integer,
.bind_framebuffer = bind_opengl_framebuffer,
.blit_framebuffer = blit_opengl_framebuffer,
});
if (!status.ok())
LOG("RTT::copy region blit failed because: %s", status.message);
});
}
@@ -314,7 +386,7 @@ bool RTT::create(int width, int height, int tex/* = -1*/, GLint internal_format,
}
GLint oldFboID;
glGetIntegerv(draw_framebuffer_binding_query(), &oldFboID);
glGetIntegerv(static_cast<GLenum>(pp::renderer::gl::draw_framebuffer_binding_query()), &oldFboID);
// Create a framebuffer object
glGenFramebuffers(1, &fboID);
@@ -440,18 +512,21 @@ uint8_t* RTT::readTextureData(uint8_t* buffer) const noexcept
App::I->render_task([&]
{
const auto readback = pp::renderer::gl::rgba8_readback_format();
GLint old;
glGetIntegerv(read_framebuffer_binding_query(), &old);
glBindFramebuffer(read_framebuffer_target(), fboID);
glReadPixels(
0,
0,
w,
h,
static_cast<GLenum>(readback.pixel_format),
static_cast<GLenum>(readback.component_type),
buffer);
glBindFramebuffer(read_framebuffer_target(), old);
const auto status = pp::renderer::gl::readback_opengl_framebuffer(
pp::renderer::gl::OpenGlFramebufferReadback {
.framebuffer = static_cast<std::uint32_t>(fboID),
.width = w,
.height = h,
.format = readback,
.pixels = buffer,
},
pp::renderer::gl::OpenGlFramebufferReadbackDispatch {
.get_integer = query_opengl_integer,
.bind_framebuffer = bind_opengl_framebuffer,
.read_pixels = read_opengl_pixels,
});
if (!status.ok())
LOG("RTT::readTextureData() failed because: %s", status.message);
});
return buffer;
}
@@ -465,18 +540,21 @@ float* RTT::readTextureDataFloat(float* buffer) const noexcept
App::I->render_task([&]
{
const auto readback = pp::renderer::gl::rgba32f_readback_format();
GLint old;
glGetIntegerv(read_framebuffer_binding_query(), &old);
glBindFramebuffer(read_framebuffer_target(), fboID);
glReadPixels(
0,
0,
w,
h,
static_cast<GLenum>(readback.pixel_format),
static_cast<GLenum>(readback.component_type),
buffer);
glBindFramebuffer(read_framebuffer_target(), old);
const auto status = pp::renderer::gl::readback_opengl_framebuffer(
pp::renderer::gl::OpenGlFramebufferReadback {
.framebuffer = static_cast<std::uint32_t>(fboID),
.width = w,
.height = h,
.format = readback,
.pixels = buffer,
},
pp::renderer::gl::OpenGlFramebufferReadbackDispatch {
.get_integer = query_opengl_integer,
.bind_framebuffer = bind_opengl_framebuffer,
.read_pixels = read_opengl_pixels,
});
if (!status.ok())
LOG("RTT::readTextureDataFloat() failed because: %s", status.message);
});
return buffer;
}