SDL_windowsopengl.c
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/*
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: */
SDL_strlcpy
#define SDL_strlcpy
Definition: SDL_dynapi_overrides.h:400
SDL_VideoDevice::accum_alpha_size
int accum_alpha_size
Definition: SDL_sysvideo.h:302
SDL_Instance
HINSTANCE SDL_Instance
attribs
const GLint * attribs
Definition: SDL_opengl_glext.h:9688
SDL_VideoDevice::accum_blue_size
int accum_blue_size
Definition: SDL_sysvideo.h:301
result
GLuint64EXT * result
Definition: SDL_opengl_glext.h:9432
SDL_VideoDevice::buffer_size
int buffer_size
Definition: SDL_sysvideo.h:296
GL_TRUE
#define GL_TRUE
Definition: SDL_opengl.h:193
SDL_VideoDevice::minor_version
int minor_version
Definition: SDL_sysvideo.h:308
SDL_VideoDevice::blue_size
int blue_size
Definition: SDL_sysvideo.h:293
SDL_VideoDevice::accum_red_size
int accum_red_size
Definition: SDL_sysvideo.h:299
count
GLuint GLuint GLsizei count
Definition: SDL_opengl.h:1564
window
SDL_Window * window
Definition: testautomation_render.c:26
SDL_windowsopengles.h
SDL_VideoDevice::GL_SetSwapInterval
int(* GL_SetSwapInterval)(_THIS, int interval)
Definition: SDL_sysvideo.h:240
SDL_Appname
LPTSTR SDL_Appname
SDL_VideoDevice::profile_mask
int profile_mask
Definition: SDL_sysvideo.h:310
start
GLuint start
Definition: SDL_opengl.h:1564
SDL_VideoDevice::GL_SwapWindow
void(* GL_SwapWindow)(_THIS, SDL_Window *window)
Definition: SDL_sysvideo.h:242
SDL_LoadObject
#define SDL_LoadObject
Definition: SDL_dynapi_overrides.h:238
SDL_UnloadObject
#define SDL_UnloadObject
Definition: SDL_dynapi_overrides.h:240
SDL_zerop
#define SDL_zerop(x)
Definition: SDL_stdinc.h:358
SDL_VideoDevice::GL_LoadLibrary
int(* GL_LoadLibrary)(_THIS, const char *path)
Definition: SDL_sysvideo.h:234
SDL_VideoDevice::stereo
int stereo
Definition: SDL_sysvideo.h:303
SDL_VideoDevice::gl_data
struct SDL_GLDriverData * gl_data
Definition: SDL_sysvideo.h:333
SDL_WindowData
Definition: SDL_androidwindow.h:34
SDL_strchr
#define SDL_strchr
Definition: SDL_dynapi_overrides.h:407
SDL_opengl.h
_this
static SDL_VideoDevice * _this
Definition: SDL_video.c:114
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:126
SDL_VideoDevice::gl_config
struct SDL_VideoDevice::@29 gl_config
SDL_VideoDevice::accelerated
int accelerated
Definition: SDL_sysvideo.h:306
SDL_VideoDevice::multisamplebuffers
int multisamplebuffers
Definition: SDL_sysvideo.h:304
retval
SDL_bool retval
Definition: testgamecontroller.c:65
SDL_VideoDevice::multisamplesamples
int multisamplesamples
Definition: SDL_sysvideo.h:305
SDL_VideoDevice::major_version
int major_version
Definition: SDL_sysvideo.h:307
SDL_calloc
void * SDL_calloc(size_t nmemb, size_t size)
SDL_GLContext
void * SDL_GLContext
An opaque handle to an OpenGL context.
Definition: SDL_video.h:164
SDL_VideoDevice::GL_CreateContext
SDL_GLContext(* GL_CreateContext)(_THIS, SDL_Window *window)
Definition: SDL_sysvideo.h:237
SDL_VideoDevice::depth_size
int depth_size
Definition: SDL_sysvideo.h:295
SDL_VideoDevice::red_size
int red_size
Definition: SDL_sysvideo.h:291
_THIS
#define _THIS
Definition: SDL_alsa_audio.h:31
SDL_VideoDevice::GL_MakeCurrent
int(* GL_MakeCurrent)(_THIS, SDL_Window *window, SDL_GLContext context)
Definition: SDL_sysvideo.h:238
SDL_VideoDevice::double_buffer
int double_buffer
Definition: SDL_sysvideo.h:298
SDL_free
void SDL_free(void *mem)
target
GLenum target
Definition: SDL_opengl_glext.h:1551
TRUE
#define TRUE
Definition: edid-parse.c:31
SDL_VideoDevice::driver_path
char driver_path[256]
Definition: SDL_sysvideo.h:316
SDL_VideoDevice::dll_handle
void * dll_handle
Definition: SDL_sysvideo.h:317
SDL_VideoDevice::green_size
int green_size
Definition: SDL_sysvideo.h:292
APIENTRYP
#define APIENTRYP
Definition: SDL_opengl.h:137
SDL_VideoDevice::alpha_size
int alpha_size
Definition: SDL_sysvideo.h:294
SDL_TRUE
Definition: SDL_stdinc.h:129
SDL_VideoDevice::framebuffer_srgb_capable
int framebuffer_srgb_capable
Definition: SDL_sysvideo.h:313
index
GLuint index
Definition: SDL_opengl_glext.h:660
SDL_getenv
#define SDL_getenv
Definition: SDL_dynapi_overrides.h:384
SDL_VideoDevice::release_behavior
int release_behavior
Definition: SDL_sysvideo.h:312
SDL_VideoDevice::GL_UnloadLibrary
void(* GL_UnloadLibrary)(_THIS)
Definition: SDL_sysvideo.h:236
SDL_VideoDevice::stencil_size
int stencil_size
Definition: SDL_sysvideo.h:297
SDL_VideoDevice::share_with_current_context
int share_with_current_context
Definition: SDL_sysvideo.h:311
SDL_assert
#define SDL_assert(condition)
Definition: SDL_assert.h:167
NULL
#define NULL
Definition: begin_code.h:143
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_GL_GetCurrentContext
#define SDL_GL_GetCurrentContext
Definition: SDL_dynapi_overrides.h:566
SDL_VideoDevice::flags
int flags
Definition: SDL_sysvideo.h:309
WIN_SetError
int WIN_SetError(const char *prefix)
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:36
SDL_loadso.h
SDL_GL_GetCurrentWindow
#define SDL_GL_GetCurrentWindow
Definition: SDL_dynapi_overrides.h:565
WIN_PumpEvents
void WIN_PumpEvents(_THIS)
SDL_GLDriverData
Definition: SDL_pspgl_c.h:32
func
GLenum func
Definition: SDL_opengl_glext.h:657
SDL_strlen
#define SDL_strlen
Definition: SDL_dynapi_overrides.h:399
SDL_Window
The type used to identify a window.
Definition: SDL_sysvideo.h:71
SDL_FALSE
Definition: SDL_stdinc.h:128
pixel_format
Uint32 pixel_format
Definition: testoverlay2.c:152
SDL_arraysize
#define SDL_arraysize(array)
Definition: SDL_stdinc.h:93
path
GLsizei const GLchar *const * path
Definition: SDL_opengl_glext.h:3730
SDL_LoadFunction
void * SDL_LoadFunction(void *handle, const char *name)
SDL_VideoDevice::accum_green_size
int accum_green_size
Definition: SDL_sysvideo.h:300
SDL_Window::driverdata
void * driverdata
Definition: SDL_sysvideo.h:106
SDL_VideoDevice::GL_DeleteContext
void(* GL_DeleteContext)(_THIS, SDL_GLContext context)
Definition: SDL_sysvideo.h:243
SDL_GLDriverData::context
EGLContext context
Definition: SDL_pspgl_c.h:34
SDL_VideoDevice::GL_GetSwapInterval
int(* GL_GetSwapInterval)(_THIS)
Definition: SDL_sysvideo.h:241
SDL_GL_CONTEXT_PROFILE_ES
Definition: SDL_video.h:202
SDL_windowsvideo.h
SDL_Unsupported
#define SDL_Unsupported()
Definition: SDL_error.h:53
SDL_VideoDevice::GL_GetProcAddress
void *(* GL_GetProcAddress)(_THIS, const char *proc)
Definition: SDL_sysvideo.h:235
SDL_memset
#define SDL_memset
Definition: SDL_dynapi_overrides.h:392
SDL_strstr
#define SDL_strstr
Definition: SDL_dynapi_overrides.h:409
SDL_assert.h