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Diffstat (limited to '3rdparty/SDL2/src/video/windows/SDL_windowsopengl.c')
-rw-r--r--3rdparty/SDL2/src/video/windows/SDL_windowsopengl.c810
1 files changed, 0 insertions, 810 deletions
diff --git a/3rdparty/SDL2/src/video/windows/SDL_windowsopengl.c b/3rdparty/SDL2/src/video/windows/SDL_windowsopengl.c
deleted file mode 100644
index d30d838fdcc..00000000000
--- a/3rdparty/SDL2/src/video/windows/SDL_windowsopengl.c
+++ /dev/null
@@ -1,810 +0,0 @@
-/*
- Simple DirectMedia Layer
- Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
-
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the authors be held liable for any damages
- arising from the use of this software.
-
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute it
- freely, subject to the following restrictions:
-
- 1. The origin of this software must not be misrepresented; you must not
- claim that you wrote the original software. If you use this software
- in a product, an acknowledgment in the product documentation would be
- appreciated but is not required.
- 2. Altered source versions must be plainly marked as such, and must not be
- misrepresented as being the original software.
- 3. This notice may not be removed or altered from any source distribution.
-*/
-#include "../../SDL_internal.h"
-
-#if SDL_VIDEO_DRIVER_WINDOWS
-
-#include "SDL_assert.h"
-#include "SDL_loadso.h"
-#include "SDL_windowsvideo.h"
-#include "SDL_windowsopengles.h"
-
-/* WGL implementation of SDL OpenGL support */
-
-#if SDL_VIDEO_OPENGL_WGL
-#include "SDL_opengl.h"
-
-#define DEFAULT_OPENGL "OPENGL32.DLL"
-
-#ifndef WGL_ARB_create_context
-#define WGL_ARB_create_context
-#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
-#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
-#define WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
-#define WGL_CONTEXT_FLAGS_ARB 0x2094
-#define WGL_CONTEXT_DEBUG_BIT_ARB 0x0001
-#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
-
-#ifndef WGL_ARB_create_context_profile
-#define WGL_ARB_create_context_profile
-#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
-#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
-#define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
-#endif
-
-#ifndef WGL_ARB_create_context_robustness
-#define WGL_ARB_create_context_robustness
-#define WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB 0x00000004
-#define WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB 0x8256
-#define WGL_NO_RESET_NOTIFICATION_ARB 0x8261
-#define WGL_LOSE_CONTEXT_ON_RESET_ARB 0x8252
-#endif
-#endif
-
-#ifndef WGL_EXT_create_context_es2_profile
-#define WGL_EXT_create_context_es2_profile
-#define WGL_CONTEXT_ES2_PROFILE_BIT_EXT 0x00000004
-#endif
-
-#ifndef WGL_EXT_create_context_es_profile
-#define WGL_EXT_create_context_es_profile
-#define WGL_CONTEXT_ES_PROFILE_BIT_EXT 0x00000004
-#endif
-
-#ifndef WGL_ARB_framebuffer_sRGB
-#define WGL_ARB_framebuffer_sRGB
-#define WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20A9
-#endif
-
-#ifndef WGL_ARB_context_flush_control
-#define WGL_ARB_context_flush_control
-#define WGL_CONTEXT_RELEASE_BEHAVIOR_ARB 0x2097
-#define WGL_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB 0x0000
-#define WGL_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB 0x2098
-#endif
-
-typedef HGLRC(APIENTRYP PFNWGLCREATECONTEXTATTRIBSARBPROC) (HDC hDC,
- HGLRC
- hShareContext,
- const int
- *attribList);
-
-int
-WIN_GL_LoadLibrary(_THIS, const char *path)
-{
- void *handle;
-
- if (path == NULL) {
- path = SDL_getenv("SDL_OPENGL_LIBRARY");
- }
- if (path == NULL) {
- path = DEFAULT_OPENGL;
- }
- _this->gl_config.dll_handle = SDL_LoadObject(path);
- if (!_this->gl_config.dll_handle) {
- return -1;
- }
- SDL_strlcpy(_this->gl_config.driver_path, path,
- SDL_arraysize(_this->gl_config.driver_path));
-
- /* Allocate OpenGL memory */
- _this->gl_data = (struct SDL_GLDriverData *) SDL_calloc(1, sizeof(struct SDL_GLDriverData));
- if (!_this->gl_data) {
- return SDL_OutOfMemory();
- }
-
- /* Load function pointers */
- handle = _this->gl_config.dll_handle;
- _this->gl_data->wglGetProcAddress = (void *(WINAPI *) (const char *))
- SDL_LoadFunction(handle, "wglGetProcAddress");
- _this->gl_data->wglCreateContext = (HGLRC(WINAPI *) (HDC))
- SDL_LoadFunction(handle, "wglCreateContext");
- _this->gl_data->wglDeleteContext = (BOOL(WINAPI *) (HGLRC))
- SDL_LoadFunction(handle, "wglDeleteContext");
- _this->gl_data->wglMakeCurrent = (BOOL(WINAPI *) (HDC, HGLRC))
- SDL_LoadFunction(handle, "wglMakeCurrent");
- _this->gl_data->wglShareLists = (BOOL(WINAPI *) (HGLRC, HGLRC))
- SDL_LoadFunction(handle, "wglShareLists");
-
- if (!_this->gl_data->wglGetProcAddress ||
- !_this->gl_data->wglCreateContext ||
- !_this->gl_data->wglDeleteContext ||
- !_this->gl_data->wglMakeCurrent) {
- return SDL_SetError("Could not retrieve OpenGL functions");
- }
-
- return 0;
-}
-
-void *
-WIN_GL_GetProcAddress(_THIS, const char *proc)
-{
- void *func;
-
- /* This is to pick up extensions */
- func = _this->gl_data->wglGetProcAddress(proc);
- if (!func) {
- /* This is probably a normal GL function */
- func = GetProcAddress(_this->gl_config.dll_handle, proc);
- }
- return func;
-}
-
-void
-WIN_GL_UnloadLibrary(_THIS)
-{
- SDL_UnloadObject(_this->gl_config.dll_handle);
- _this->gl_config.dll_handle = NULL;
-
- /* Free OpenGL memory */
- SDL_free(_this->gl_data);
- _this->gl_data = NULL;
-}
-
-static void
-WIN_GL_SetupPixelFormat(_THIS, PIXELFORMATDESCRIPTOR * pfd)
-{
- SDL_zerop(pfd);
- pfd->nSize = sizeof(*pfd);
- pfd->nVersion = 1;
- pfd->dwFlags = (PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL);
- if (_this->gl_config.double_buffer) {
- pfd->dwFlags |= PFD_DOUBLEBUFFER;
- }
- if (_this->gl_config.stereo) {
- pfd->dwFlags |= PFD_STEREO;
- }
- pfd->iLayerType = PFD_MAIN_PLANE;
- pfd->iPixelType = PFD_TYPE_RGBA;
- pfd->cRedBits = _this->gl_config.red_size;
- pfd->cGreenBits = _this->gl_config.green_size;
- pfd->cBlueBits = _this->gl_config.blue_size;
- pfd->cAlphaBits = _this->gl_config.alpha_size;
- if (_this->gl_config.buffer_size) {
- pfd->cColorBits =
- _this->gl_config.buffer_size - _this->gl_config.alpha_size;
- } else {
- pfd->cColorBits = (pfd->cRedBits + pfd->cGreenBits + pfd->cBlueBits);
- }
- pfd->cAccumRedBits = _this->gl_config.accum_red_size;
- pfd->cAccumGreenBits = _this->gl_config.accum_green_size;
- pfd->cAccumBlueBits = _this->gl_config.accum_blue_size;
- pfd->cAccumAlphaBits = _this->gl_config.accum_alpha_size;
- pfd->cAccumBits =
- (pfd->cAccumRedBits + pfd->cAccumGreenBits + pfd->cAccumBlueBits +
- pfd->cAccumAlphaBits);
- pfd->cDepthBits = _this->gl_config.depth_size;
- pfd->cStencilBits = _this->gl_config.stencil_size;
-}
-
-/* Choose the closest pixel format that meets or exceeds the target.
- FIXME: Should we weight any particular attribute over any other?
-*/
-static int
-WIN_GL_ChoosePixelFormat(HDC hdc, PIXELFORMATDESCRIPTOR * target)
-{
- PIXELFORMATDESCRIPTOR pfd;
- int count, index, best = 0;
- unsigned int dist, best_dist = ~0U;
-
- count = DescribePixelFormat(hdc, 1, sizeof(pfd), NULL);
-
- for (index = 1; index <= count; index++) {
-
- if (!DescribePixelFormat(hdc, index, sizeof(pfd), &pfd)) {
- continue;
- }
-
- if ((pfd.dwFlags & target->dwFlags) != target->dwFlags) {
- continue;
- }
-
- if (pfd.iLayerType != target->iLayerType) {
- continue;
- }
- if (pfd.iPixelType != target->iPixelType) {
- continue;
- }
-
- dist = 0;
-
- if (pfd.cColorBits < target->cColorBits) {
- continue;
- } else {
- dist += (pfd.cColorBits - target->cColorBits);
- }
- if (pfd.cRedBits < target->cRedBits) {
- continue;
- } else {
- dist += (pfd.cRedBits - target->cRedBits);
- }
- if (pfd.cGreenBits < target->cGreenBits) {
- continue;
- } else {
- dist += (pfd.cGreenBits - target->cGreenBits);
- }
- if (pfd.cBlueBits < target->cBlueBits) {
- continue;
- } else {
- dist += (pfd.cBlueBits - target->cBlueBits);
- }
- if (pfd.cAlphaBits < target->cAlphaBits) {
- continue;
- } else {
- dist += (pfd.cAlphaBits - target->cAlphaBits);
- }
- if (pfd.cAccumBits < target->cAccumBits) {
- continue;
- } else {
- dist += (pfd.cAccumBits - target->cAccumBits);
- }
- if (pfd.cAccumRedBits < target->cAccumRedBits) {
- continue;
- } else {
- dist += (pfd.cAccumRedBits - target->cAccumRedBits);
- }
- if (pfd.cAccumGreenBits < target->cAccumGreenBits) {
- continue;
- } else {
- dist += (pfd.cAccumGreenBits - target->cAccumGreenBits);
- }
- if (pfd.cAccumBlueBits < target->cAccumBlueBits) {
- continue;
- } else {
- dist += (pfd.cAccumBlueBits - target->cAccumBlueBits);
- }
- if (pfd.cAccumAlphaBits < target->cAccumAlphaBits) {
- continue;
- } else {
- dist += (pfd.cAccumAlphaBits - target->cAccumAlphaBits);
- }
- if (pfd.cDepthBits < target->cDepthBits) {
- continue;
- } else {
- dist += (pfd.cDepthBits - target->cDepthBits);
- }
- if (pfd.cStencilBits < target->cStencilBits) {
- continue;
- } else {
- dist += (pfd.cStencilBits - target->cStencilBits);
- }
-
- if (dist < best_dist) {
- best = index;
- best_dist = dist;
- }
- }
-
- return best;
-}
-
-static SDL_bool
-HasExtension(const char *extension, const char *extensions)
-{
- const char *start;
- const char *where, *terminator;
-
- /* Extension names should not have spaces. */
- where = SDL_strchr(extension, ' ');
- if (where || *extension == '\0')
- return SDL_FALSE;
-
- if (!extensions)
- return SDL_FALSE;
-
- /* It takes a bit of care to be fool-proof about parsing the
- * OpenGL extensions string. Don't be fooled by sub-strings,
- * etc. */
-
- start = extensions;
-
- for (;;) {
- where = SDL_strstr(start, extension);
- if (!where)
- break;
-
- terminator = where + SDL_strlen(extension);
- if (where == start || *(where - 1) == ' ')
- if (*terminator == ' ' || *terminator == '\0')
- return SDL_TRUE;
-
- start = terminator;
- }
- return SDL_FALSE;
-}
-
-void
-WIN_GL_InitExtensions(_THIS)
-{
- const char *(WINAPI * wglGetExtensionsStringARB) (HDC) = 0;
- const char *extensions;
- HWND hwnd;
- HDC hdc;
- HGLRC hglrc;
- PIXELFORMATDESCRIPTOR pfd;
-
- if (!_this->gl_data) {
- return;
- }
-
- hwnd =
- CreateWindow(SDL_Appname, SDL_Appname, (WS_POPUP | WS_DISABLED), 0, 0,
- 10, 10, NULL, NULL, SDL_Instance, NULL);
- if (!hwnd) {
- return;
- }
- WIN_PumpEvents(_this);
-
- hdc = GetDC(hwnd);
-
- WIN_GL_SetupPixelFormat(_this, &pfd);
-
- SetPixelFormat(hdc, ChoosePixelFormat(hdc, &pfd), &pfd);
-
- hglrc = _this->gl_data->wglCreateContext(hdc);
- if (!hglrc) {
- return;
- }
- _this->gl_data->wglMakeCurrent(hdc, hglrc);
-
- wglGetExtensionsStringARB = (const char *(WINAPI *) (HDC))
- _this->gl_data->wglGetProcAddress("wglGetExtensionsStringARB");
- if (wglGetExtensionsStringARB) {
- extensions = wglGetExtensionsStringARB(hdc);
- } else {
- extensions = NULL;
- }
-
- /* Check for WGL_ARB_pixel_format */
- _this->gl_data->HAS_WGL_ARB_pixel_format = SDL_FALSE;
- if (HasExtension("WGL_ARB_pixel_format", extensions)) {
- _this->gl_data->wglChoosePixelFormatARB = (BOOL(WINAPI *)
- (HDC, const int *,
- const FLOAT *, UINT,
- int *, UINT *))
- WIN_GL_GetProcAddress(_this, "wglChoosePixelFormatARB");
- _this->gl_data->wglGetPixelFormatAttribivARB =
- (BOOL(WINAPI *) (HDC, int, int, UINT, const int *, int *))
- WIN_GL_GetProcAddress(_this, "wglGetPixelFormatAttribivARB");
-
- if ((_this->gl_data->wglChoosePixelFormatARB != NULL) &&
- (_this->gl_data->wglGetPixelFormatAttribivARB != NULL)) {
- _this->gl_data->HAS_WGL_ARB_pixel_format = SDL_TRUE;
- }
- }
-
- /* Check for WGL_EXT_swap_control */
- _this->gl_data->HAS_WGL_EXT_swap_control_tear = SDL_FALSE;
- if (HasExtension("WGL_EXT_swap_control", extensions)) {
- _this->gl_data->wglSwapIntervalEXT =
- WIN_GL_GetProcAddress(_this, "wglSwapIntervalEXT");
- _this->gl_data->wglGetSwapIntervalEXT =
- WIN_GL_GetProcAddress(_this, "wglGetSwapIntervalEXT");
- if (HasExtension("WGL_EXT_swap_control_tear", extensions)) {
- _this->gl_data->HAS_WGL_EXT_swap_control_tear = SDL_TRUE;
- }
- } else {
- _this->gl_data->wglSwapIntervalEXT = NULL;
- _this->gl_data->wglGetSwapIntervalEXT = NULL;
- }
-
- /* Check for WGL_EXT_create_context_es2_profile */
- _this->gl_data->HAS_WGL_EXT_create_context_es2_profile = SDL_FALSE;
- if (HasExtension("WGL_EXT_create_context_es2_profile", extensions)) {
- _this->gl_data->HAS_WGL_EXT_create_context_es2_profile = SDL_TRUE;
- }
-
- /* Check for GLX_ARB_context_flush_control */
- if (HasExtension("WGL_ARB_context_flush_control", extensions)) {
- _this->gl_data->HAS_WGL_ARB_context_flush_control = SDL_TRUE;
- }
-
- _this->gl_data->wglMakeCurrent(hdc, NULL);
- _this->gl_data->wglDeleteContext(hglrc);
- ReleaseDC(hwnd, hdc);
- DestroyWindow(hwnd);
- WIN_PumpEvents(_this);
-}
-
-static int
-WIN_GL_ChoosePixelFormatARB(_THIS, int *iAttribs, float *fAttribs)
-{
- HWND hwnd;
- HDC hdc;
- PIXELFORMATDESCRIPTOR pfd;
- HGLRC hglrc;
- int pixel_format = 0;
- unsigned int matching;
-
- hwnd =
- CreateWindow(SDL_Appname, SDL_Appname, (WS_POPUP | WS_DISABLED), 0, 0,
- 10, 10, NULL, NULL, SDL_Instance, NULL);
- WIN_PumpEvents(_this);
-
- hdc = GetDC(hwnd);
-
- WIN_GL_SetupPixelFormat(_this, &pfd);
-
- SetPixelFormat(hdc, ChoosePixelFormat(hdc, &pfd), &pfd);
-
- hglrc = _this->gl_data->wglCreateContext(hdc);
- if (hglrc) {
- _this->gl_data->wglMakeCurrent(hdc, hglrc);
-
- if (_this->gl_data->HAS_WGL_ARB_pixel_format) {
- _this->gl_data->wglChoosePixelFormatARB(hdc, iAttribs, fAttribs,
- 1, &pixel_format,
- &matching);
- }
-
- _this->gl_data->wglMakeCurrent(hdc, NULL);
- _this->gl_data->wglDeleteContext(hglrc);
- }
- ReleaseDC(hwnd, hdc);
- DestroyWindow(hwnd);
- WIN_PumpEvents(_this);
-
- return pixel_format;
-}
-
-/* actual work of WIN_GL_SetupWindow() happens here. */
-static int
-WIN_GL_SetupWindowInternal(_THIS, SDL_Window * window)
-{
- HDC hdc = ((SDL_WindowData *) window->driverdata)->hdc;
- PIXELFORMATDESCRIPTOR pfd;
- int pixel_format = 0;
- int iAttribs[64];
- int *iAttr;
- int *iAccelAttr;
- float fAttribs[1] = { 0 };
-
- WIN_GL_SetupPixelFormat(_this, &pfd);
-
- /* setup WGL_ARB_pixel_format attribs */
- iAttr = &iAttribs[0];
-
- *iAttr++ = WGL_DRAW_TO_WINDOW_ARB;
- *iAttr++ = GL_TRUE;
- *iAttr++ = WGL_RED_BITS_ARB;
- *iAttr++ = _this->gl_config.red_size;
- *iAttr++ = WGL_GREEN_BITS_ARB;
- *iAttr++ = _this->gl_config.green_size;
- *iAttr++ = WGL_BLUE_BITS_ARB;
- *iAttr++ = _this->gl_config.blue_size;
-
- if (_this->gl_config.alpha_size) {
- *iAttr++ = WGL_ALPHA_BITS_ARB;
- *iAttr++ = _this->gl_config.alpha_size;
- }
-
- *iAttr++ = WGL_DOUBLE_BUFFER_ARB;
- *iAttr++ = _this->gl_config.double_buffer;
-
- *iAttr++ = WGL_DEPTH_BITS_ARB;
- *iAttr++ = _this->gl_config.depth_size;
-
- if (_this->gl_config.stencil_size) {
- *iAttr++ = WGL_STENCIL_BITS_ARB;
- *iAttr++ = _this->gl_config.stencil_size;
- }
-
- if (_this->gl_config.accum_red_size) {
- *iAttr++ = WGL_ACCUM_RED_BITS_ARB;
- *iAttr++ = _this->gl_config.accum_red_size;
- }
-
- if (_this->gl_config.accum_green_size) {
- *iAttr++ = WGL_ACCUM_GREEN_BITS_ARB;
- *iAttr++ = _this->gl_config.accum_green_size;
- }
-
- if (_this->gl_config.accum_blue_size) {
- *iAttr++ = WGL_ACCUM_BLUE_BITS_ARB;
- *iAttr++ = _this->gl_config.accum_blue_size;
- }
-
- if (_this->gl_config.accum_alpha_size) {
- *iAttr++ = WGL_ACCUM_ALPHA_BITS_ARB;
- *iAttr++ = _this->gl_config.accum_alpha_size;
- }
-
- if (_this->gl_config.stereo) {
- *iAttr++ = WGL_STEREO_ARB;
- *iAttr++ = GL_TRUE;
- }
-
- if (_this->gl_config.multisamplebuffers) {
- *iAttr++ = WGL_SAMPLE_BUFFERS_ARB;
- *iAttr++ = _this->gl_config.multisamplebuffers;
- }
-
- if (_this->gl_config.multisamplesamples) {
- *iAttr++ = WGL_SAMPLES_ARB;
- *iAttr++ = _this->gl_config.multisamplesamples;
- }
-
- if (_this->gl_config.framebuffer_srgb_capable) {
- *iAttr++ = WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB;
- *iAttr++ = _this->gl_config.framebuffer_srgb_capable;
- }
-
- /* We always choose either FULL or NO accel on Windows, because of flaky
- drivers. If the app didn't specify, we use FULL, because that's
- probably what they wanted (and if you didn't care and got FULL, that's
- a perfectly valid result in any case). */
- *iAttr++ = WGL_ACCELERATION_ARB;
- iAccelAttr = iAttr;
- if (_this->gl_config.accelerated) {
- *iAttr++ = WGL_FULL_ACCELERATION_ARB;
- } else {
- *iAttr++ = WGL_NO_ACCELERATION_ARB;
- }
-
- *iAttr = 0;
-
- /* Choose and set the closest available pixel format */
- pixel_format = WIN_GL_ChoosePixelFormatARB(_this, iAttribs, fAttribs);
-
- /* App said "don't care about accel" and FULL accel failed. Try NO. */
- if ( ( !pixel_format ) && ( _this->gl_config.accelerated < 0 ) ) {
- *iAccelAttr = WGL_NO_ACCELERATION_ARB;
- pixel_format = WIN_GL_ChoosePixelFormatARB(_this, iAttribs, fAttribs);
- *iAccelAttr = WGL_FULL_ACCELERATION_ARB; /* if we try again. */
- }
- if (!pixel_format) {
- pixel_format = WIN_GL_ChoosePixelFormat(hdc, &pfd);
- }
- if (!pixel_format) {
- return SDL_SetError("No matching GL pixel format available");
- }
- if (!SetPixelFormat(hdc, pixel_format, &pfd)) {
- return WIN_SetError("SetPixelFormat()");
- }
- return 0;
-}
-
-int
-WIN_GL_SetupWindow(_THIS, SDL_Window * window)
-{
- /* The current context is lost in here; save it and reset it. */
- SDL_Window *current_win = SDL_GL_GetCurrentWindow();
- SDL_GLContext current_ctx = SDL_GL_GetCurrentContext();
- const int retval = WIN_GL_SetupWindowInternal(_this, window);
- WIN_GL_MakeCurrent(_this, current_win, current_ctx);
- return retval;
-}
-
-SDL_GLContext
-WIN_GL_CreateContext(_THIS, SDL_Window * window)
-{
- HDC hdc = ((SDL_WindowData *) window->driverdata)->hdc;
- HGLRC context, share_context;
-
- if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES &&
- !_this->gl_data->HAS_WGL_EXT_create_context_es2_profile) {
-#if SDL_VIDEO_OPENGL_EGL
- /* Switch to EGL based functions */
- WIN_GL_UnloadLibrary(_this);
- _this->GL_LoadLibrary = WIN_GLES_LoadLibrary;
- _this->GL_GetProcAddress = WIN_GLES_GetProcAddress;
- _this->GL_UnloadLibrary = WIN_GLES_UnloadLibrary;
- _this->GL_CreateContext = WIN_GLES_CreateContext;
- _this->GL_MakeCurrent = WIN_GLES_MakeCurrent;
- _this->GL_SetSwapInterval = WIN_GLES_SetSwapInterval;
- _this->GL_GetSwapInterval = WIN_GLES_GetSwapInterval;
- _this->GL_SwapWindow = WIN_GLES_SwapWindow;
- _this->GL_DeleteContext = WIN_GLES_DeleteContext;
-
- if (WIN_GLES_LoadLibrary(_this, NULL) != 0) {
- return NULL;
- }
-
- return WIN_GLES_CreateContext(_this, window);
-#else
- SDL_SetError("SDL not configured with EGL support");
- return NULL;
-#endif
- }
-
- if (_this->gl_config.share_with_current_context) {
- share_context = (HGLRC)SDL_GL_GetCurrentContext();
- } else {
- share_context = 0;
- }
-
- if (_this->gl_config.major_version < 3 &&
- _this->gl_config.profile_mask == 0 &&
- _this->gl_config.flags == 0) {
- /* Create legacy context */
- context = _this->gl_data->wglCreateContext(hdc);
- if( share_context != 0 ) {
- _this->gl_data->wglShareLists(share_context, context);
- }
- } else {
- PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
- HGLRC temp_context = _this->gl_data->wglCreateContext(hdc);
- if (!temp_context) {
- SDL_SetError("Could not create GL context");
- return NULL;
- }
-
- /* Make the context current */
- if (WIN_GL_MakeCurrent(_this, window, temp_context) < 0) {
- WIN_GL_DeleteContext(_this, temp_context);
- return NULL;
- }
-
- wglCreateContextAttribsARB =
- (PFNWGLCREATECONTEXTATTRIBSARBPROC) _this->gl_data->
- wglGetProcAddress("wglCreateContextAttribsARB");
- if (!wglCreateContextAttribsARB) {
- SDL_SetError("GL 3.x is not supported");
- context = temp_context;
- } else {
- /* max 10 attributes plus terminator */
- int attribs[11] = {
- WGL_CONTEXT_MAJOR_VERSION_ARB, _this->gl_config.major_version,
- WGL_CONTEXT_MINOR_VERSION_ARB, _this->gl_config.minor_version,
- 0
- };
- int iattr = 4;
-
- /* SDL profile bits match WGL profile bits */
- if (_this->gl_config.profile_mask != 0) {
- attribs[iattr++] = WGL_CONTEXT_PROFILE_MASK_ARB;
- attribs[iattr++] = _this->gl_config.profile_mask;
- }
-
- /* SDL flags match WGL flags */
- if (_this->gl_config.flags != 0) {
- attribs[iattr++] = WGL_CONTEXT_FLAGS_ARB;
- attribs[iattr++] = _this->gl_config.flags;
- }
-
- /* only set if wgl extension is available */
- if (_this->gl_data->HAS_WGL_ARB_context_flush_control) {
- attribs[iattr++] = WGL_CONTEXT_RELEASE_BEHAVIOR_ARB;
- attribs[iattr++] = _this->gl_config.release_behavior ?
- WGL_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB :
- WGL_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB;
- }
-
- attribs[iattr++] = 0;
-
- /* Create the GL 3.x context */
- context = wglCreateContextAttribsARB(hdc, share_context, attribs);
- /* Delete the GL 2.x context */
- _this->gl_data->wglDeleteContext(temp_context);
- }
- }
-
- if (!context) {
- WIN_SetError("Could not create GL context");
- return NULL;
- }
-
- if (WIN_GL_MakeCurrent(_this, window, context) < 0) {
- WIN_GL_DeleteContext(_this, context);
- return NULL;
- }
-
- return context;
-}
-
-int
-WIN_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
-{
- HDC hdc;
-
- if (!_this->gl_data) {
- return SDL_SetError("OpenGL not initialized");
- }
-
- /* sanity check that higher level handled this. */
- SDL_assert(window || (!window && !context));
-
- /* Some Windows drivers freak out if hdc is NULL, even when context is
- NULL, against spec. Since hdc is _supposed_ to be ignored if context
- is NULL, we either use the current GL window, or do nothing if we
- already have no current context. */
- if (!window) {
- window = SDL_GL_GetCurrentWindow();
- if (!window) {
- SDL_assert(SDL_GL_GetCurrentContext() == NULL);
- return 0; /* already done. */
- }
- }
-
- hdc = ((SDL_WindowData *) window->driverdata)->hdc;
- if (!_this->gl_data->wglMakeCurrent(hdc, (HGLRC) context)) {
- return WIN_SetError("wglMakeCurrent()");
- }
- return 0;
-}
-
-int
-WIN_GL_SetSwapInterval(_THIS, int interval)
-{
- if ((interval < 0) && (!_this->gl_data->HAS_WGL_EXT_swap_control_tear)) {
- return SDL_SetError("Negative swap interval unsupported in this GL");
- } else if (_this->gl_data->wglSwapIntervalEXT) {
- if (_this->gl_data->wglSwapIntervalEXT(interval) != TRUE) {
- return WIN_SetError("wglSwapIntervalEXT()");
- }
- } else {
- return SDL_Unsupported();
- }
- return 0;
-}
-
-int
-WIN_GL_GetSwapInterval(_THIS)
-{
- int retval = 0;
- if (_this->gl_data->wglGetSwapIntervalEXT) {
- retval = _this->gl_data->wglGetSwapIntervalEXT();
- }
- return retval;
-}
-
-void
-WIN_GL_SwapWindow(_THIS, SDL_Window * window)
-{
- HDC hdc = ((SDL_WindowData *) window->driverdata)->hdc;
-
- SwapBuffers(hdc);
-}
-
-void
-WIN_GL_DeleteContext(_THIS, SDL_GLContext context)
-{
- if (!_this->gl_data) {
- return;
- }
- _this->gl_data->wglDeleteContext((HGLRC) context);
-}
-
-
-SDL_bool
-WIN_GL_SetPixelFormatFrom(_THIS, SDL_Window * fromWindow, SDL_Window * toWindow)
-{
- HDC hfromdc = ((SDL_WindowData *) fromWindow->driverdata)->hdc;
- HDC htodc = ((SDL_WindowData *) toWindow->driverdata)->hdc;
- BOOL result;
-
- /* get the pixel format of the fromWindow */
- int pixel_format = GetPixelFormat(hfromdc);
- PIXELFORMATDESCRIPTOR pfd;
- SDL_memset(&pfd, 0, sizeof(pfd));
- DescribePixelFormat(hfromdc, pixel_format, sizeof(pfd), &pfd);
-
- /* set the pixel format of the toWindow */
- result = SetPixelFormat(htodc, pixel_format, &pfd);
-
- return result ? SDL_TRUE : SDL_FALSE;
-}
-
-#endif /* SDL_VIDEO_OPENGL_WGL */
-
-#endif /* SDL_VIDEO_DRIVER_WINDOWS */
-
-/* vi: set ts=4 sw=4 expandtab: */