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Rewrite RenderWindow::capture to make use of a single texture transfer instead of transferring each row of the framebuffer individually.

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binary1248 2015-11-12 22:08:38 +01:00 • committed by Lukas Dürrenberger
parent 146f63874a
commit 043fb83cd8
2 changed files with 18 additions and 18 deletions
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23
src/SFML/Graphics/RenderWindow.cpp
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@ -26,7 +26,7 @@
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Graphics/RenderWindow.hpp>
#include <SFML/Graphics/GLCheck.hpp>
#include <SFML/Graphics/Texture.hpp>
namespace sf
@ -78,24 +78,13 @@ Vector2u RenderWindow::getSize() const
////////////////////////////////////////////////////////////
Image RenderWindow::capture() const
{
Image image;
if (setActive())
{
int width = static_cast<int>(getSize().x);
int height = static_cast<int>(getSize().y);
Vector2u windowSize = getSize();
// copy rows one by one and flip them (OpenGL's origin is bottom while SFML's origin is top)
std::vector<Uint8> pixels(width * height * 4);
for (int i = 0; i < height; ++i)
{
Uint8* ptr = &pixels[i * width * 4];
glCheck(glReadPixels(0, height - i - 1, width, 1, GL_RGBA, GL_UNSIGNED_BYTE, ptr));
}
Texture texture;
texture.create(windowSize.x, windowSize.y);
texture.update(*this);
image.create(width, height, &pixels[0]);
}
return image;
return texture.copyToImage();
}