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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "hpl1/opengl.h"
#include "common/rect.h"
#include "common/system.h"
#include "graphics/surface.h"
#include "hpl1/debug.h"
#ifdef USE_OPENGL
namespace Hpl1 {
static const char *getErrorString(const GLenum code) {
switch (code) {
case GL_INVALID_ENUM:
return "GL_INVALID_ENUM";
case GL_INVALID_VALUE:
return "GL_INVALID_VALUE";
case GL_INVALID_OPERATION:
return "GL_INVALID_OPERATION";
}
return "unrecognized error";
}
void checkOGLErrors(const char *function, const char *file, int line) {
GLenum code;
while ((code = glGetError()) != GL_NO_ERROR)
logError(kDebugOpenGL, "Opengl error: \'%s\' in function %s (%s:%d)\n", getErrorString(code), function, file, line);
}
static Common::Rect getGLViewport() {
int viewportSize[4];
GL_CHECK(glGetIntegerv(GL_VIEWPORT, viewportSize));
return Common::Rect(viewportSize[0], viewportSize[1], viewportSize[2], viewportSize[3]);
}
static Graphics::PixelFormat getRGBAPixelFormat() {
#ifdef SCUMM_BIG_ENDIAN
return Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0);
#else
return Graphics::PixelFormat(4, 8, 8, 8, 8, 0, 8, 16, 24);
#endif
}
Common::ScopedPtr<Graphics::Surface> createGLViewportScreenshot() {
Common::ScopedPtr<Graphics::Surface> screen(new Graphics::Surface());
Common::Rect viewportSize = getGLViewport();
screen->create(viewportSize.width(), viewportSize.height(), getRGBAPixelFormat());
GL_CHECK(glReadPixels(viewportSize.left, g_system->getHeight() - viewportSize.bottom, viewportSize.width(), viewportSize.height(), GL_RGBA, GL_UNSIGNED_BYTE, screen->getPixels()));
screen->flipVertical(Common::Rect(screen->w, screen->h));
return screen;
}
} // End of namespace Hpl1
#endif // USE_OPENGL
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