119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
//========================================================================
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// GLFW - An OpenGL framework
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// Platform: Any
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// API version: 3.0
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// WWW: http://www.glfw.org/
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//------------------------------------------------------------------------
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// Copyright (c) 2002-2006 Marcus Geelnard
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// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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#include "internal.h"
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#include <stdlib.h>
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//========================================================================
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// Lexical comparison function for GLFW video modes, used by qsort
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//========================================================================
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static int compareVideoModes(const void* firstPtr, const void* secondPtr)
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{
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int firstBPP, secondBPP, firstSize, secondSize;
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GLFWvidmode* first = (GLFWvidmode*) firstPtr;
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GLFWvidmode* second = (GLFWvidmode*) secondPtr;
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// First sort on color bits per pixel
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firstBPP = first->redBits +
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first->greenBits +
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first->blueBits;
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secondBPP = second->redBits +
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second->greenBits +
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second->blueBits;
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if (firstBPP != secondBPP)
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return firstBPP - secondBPP;
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// Then sort on screen area, in pixels
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firstSize = first->width * first->height;
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secondSize = second->width * second->height;
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return firstSize - secondSize;
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW public API //////
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//////////////////////////////////////////////////////////////////////////
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//========================================================================
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// Get a list of available video modes
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//========================================================================
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GLFWAPI int glfwGetVideoModes(GLFWvidmode* list, int maxcount)
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{
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int count;
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if (!_glfwInitialized)
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{
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_glfwSetError(GLFW_NOT_INITIALIZED);
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return 0;
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}
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if (maxcount <= 0 || list == NULL)
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{
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// TODO: Figure out if this is an error
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return 0;
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}
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count = _glfwPlatformGetVideoModes(list, maxcount);
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if (count > 0)
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qsort(list, count, sizeof(GLFWvidmode), compareVideoModes);
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return count;
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}
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//========================================================================
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// Get the desktop video mode
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//========================================================================
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GLFWAPI void glfwGetDesktopMode(GLFWvidmode* mode)
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{
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if (!_glfwInitialized)
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{
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_glfwSetError(GLFW_NOT_INITIALIZED);
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return;
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}
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if (mode == NULL)
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{
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_glfwSetError(GLFW_INVALID_VALUE);
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return;
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}
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_glfwPlatformGetDesktopMode(mode);
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}
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