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LibAccelGfx+LibWeb: Use framebuffer object instead of EGLs PBuffer

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Framebuffer object is allocated using OpenGL's API and is not platform
specific which means it could be used on both macOS and Linux unlike
EGL specific PBuffer.
This commit is contained in:
Aliaksandr Kalenik 2023-11-11 17:34:44 +01:00 • committed by Andreas Kling
parent 99caf4e649
commit 6d1a1daff9
12 changed files with 70 additions and 132 deletions
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26
Userland/Libraries/LibAccelGfx/Painter.cpp
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@ -6,7 +6,6 @@
*/
#include <AK/QuickSort.h>
#include <LibAccelGfx/Canvas.h>
#include <LibAccelGfx/GL.h>
#include <LibAccelGfx/Painter.h>
#include <LibGfx/Color.h>
@ -33,11 +32,11 @@ static ColorComponents gfx_color_to_opengl_color(Gfx::Color color)
Gfx::FloatRect Painter::to_clip_space(Gfx::FloatRect const& screen_rect) const
{
float x = 2.0f * screen_rect.x() / m_canvas->width() - 1.0f;
float y = -1.0f + 2.0f * screen_rect.y() / m_canvas->height();
float x = 2.0f * screen_rect.x() / m_target_bitmap->width() - 1.0f;
float y = -1.0f + 2.0f * screen_rect.y() / m_target_bitmap->height();
float width = 2.0f * screen_rect.width() / m_canvas->width();
float height = 2.0f * screen_rect.height() / m_canvas->height();
float width = 2.0f * screen_rect.width() / m_target_bitmap->width();
float height = 2.0f * screen_rect.height() / m_target_bitmap->height();
return { x, y, width, height };
}
@ -418,9 +417,24 @@ void Painter::restore()
m_state_stack.take_last();
}
void Painter::set_target_bitmap(Gfx::Bitmap& bitmap)
{
if (m_target_framebuffer.has_value()) {
GL::delete_framebuffer(*m_target_framebuffer);
m_target_framebuffer = {};
}
m_target_framebuffer = GL::create_framebuffer(bitmap.size());
GL::bind_framebuffer(*m_target_framebuffer);
GL::set_viewport({ 0, 0, bitmap.width(), bitmap.height() });
m_target_bitmap = bitmap;
}
void Painter::flush()
{
m_canvas->flush();
VERIFY(m_target_bitmap.has_value());
GL::bind_framebuffer(*m_target_framebuffer);
GL::read_pixels({ 0, 0, m_target_bitmap->width(), m_target_bitmap->height() }, *m_target_bitmap);
}
}