thirdparty/scummvm
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SDL: Implement screenshot saving

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DouglasLiuGamer 2019-02-12 14:43:18 +08:00 • committed by Bastien Bouclet
parent 203577d66b
commit d4d6e6203b
10 changed files with 185 additions and 0 deletions
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62
backends/graphics/openglsdl/openglsdl-graphics.cpp
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@ -28,6 +28,7 @@
#include "backends/events/sdl/sdl-events.h"
#include "common/config-manager.h"
#include "common/file.h"
#include "engines/engine.h"
#include "graphics/pixelbuffer.h"
#include "graphics/opengl/context.h"
@ -36,6 +37,7 @@
#include "graphics/opengl/system_headers.h"
#include "graphics/opengl/texture.h"
#include "graphics/opengl/tiledsurface.h"
#include "image/png.h"
OpenGLSdlGraphicsManager::OpenGLSdlGraphicsManager(SdlEventSource *sdlEventSource, SdlWindow *window, const Capabilities &capabilities)
:
@ -652,4 +654,64 @@ void OpenGLSdlGraphicsManager::deinitializeRenderer() {
}
#endif // SDL_VERSION_ATLEAST(2, 0, 0)
bool OpenGLSdlGraphicsManager::saveScreenshot(const Common::String &file) const {
// Largely based on the implementation from ScummVM
uint width = _overlayScreen->getWidth();
uint height = _overlayScreen->getHeight();
uint linePaddingSize = width % 4;
uint lineSize = width * 3 + linePaddingSize;
Common::DumpFile out;
if (!out.open(file)) {
return false;
}
Common::Array<uint8> pixels;
pixels.resize(lineSize * height);
if (_frameBuffer) {
_frameBuffer->detach();
}
glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, &pixels.front());
if (_frameBuffer) {
_frameBuffer->attach();
}
#ifdef USE_PNG
Graphics::PixelFormat format(3, 8, 8, 8, 0, 16, 8, 0, 0);
Graphics::Surface data;
data.init(width, height, lineSize, &pixels.front(), format);
return Image::writePNG(out, data, true);
#else
for (uint y = height; y-- > 0;) {
uint8 *line = &pixels.front() + y * lineSize;
for (uint x = width; x > 0; --x, line += 3) {
SWAP(line[0], line[2]);
}
}
out.writeByte('B');
out.writeByte('M');
out.writeUint32LE(height * lineSize + 54);
out.writeUint32LE(0);
out.writeUint32LE(54);
out.writeUint32LE(40);
out.writeUint32LE(width);
out.writeUint32LE(height);
out.writeUint16LE(1);
out.writeUint16LE(24);
out.writeUint32LE(0);
out.writeUint32LE(0);
out.writeUint32LE(0);
out.writeUint32LE(0);
out.writeUint32LE(0);
out.writeUint32LE(0);
out.write(&pixels.front(), pixels.size());
return true;
#endif
}
#endif