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