src/video/windows/SDL_windowsopengl.c
author Gabriel Jacobo <gabomdq@gmail.com>
Fri, 22 Nov 2013 14:19:52 -0300
changeset 8022 7396e3cc5337
parent 8021 f96e12e0ade9
child 8080 bf767de0bcdc
permissions -rw-r--r--
Fixes compilation on Mingw.
slouken@1913
     1
/*
slouken@5535
     2
  Simple DirectMedia Layer
slouken@6885
     3
  Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
slouken@1913
     4
slouken@5535
     5
  This software is provided 'as-is', without any express or implied
slouken@5535
     6
  warranty.  In no event will the authors be held liable for any damages
slouken@5535
     7
  arising from the use of this software.
slouken@1913
     8
slouken@5535
     9
  Permission is granted to anyone to use this software for any purpose,
slouken@5535
    10
  including commercial applications, and to alter it and redistribute it
slouken@5535
    11
  freely, subject to the following restrictions:
slouken@1913
    12
slouken@5535
    13
  1. The origin of this software must not be misrepresented; you must not
slouken@5535
    14
     claim that you wrote the original software. If you use this software
slouken@5535
    15
     in a product, an acknowledgment in the product documentation would be
slouken@5535
    16
     appreciated but is not required.
slouken@5535
    17
  2. Altered source versions must be plainly marked as such, and must not be
slouken@5535
    18
     misrepresented as being the original software.
slouken@5535
    19
  3. This notice may not be removed or altered from any source distribution.
slouken@1913
    20
*/
slouken@1913
    21
#include "SDL_config.h"
slouken@1913
    22
slouken@6044
    23
#if SDL_VIDEO_DRIVER_WINDOWS
slouken@6044
    24
icculus@7553
    25
#include "SDL_assert.h"
slouken@7865
    26
#include "SDL_loadso.h"
slouken@5062
    27
#include "SDL_windowsvideo.h"
gabomdq@8021
    28
#include "SDL_windowsopengles.h"
slouken@1913
    29
slouken@1913
    30
/* WGL implementation of SDL OpenGL support */
slouken@1913
    31
slouken@1952
    32
#if SDL_VIDEO_OPENGL_WGL
slouken@1913
    33
#include "SDL_opengl.h"
slouken@1913
    34
slouken@1952
    35
#define DEFAULT_OPENGL "OPENGL32.DLL"
slouken@1913
    36
slouken@3100
    37
#ifndef WGL_ARB_create_context
slouken@3100
    38
#define WGL_ARB_create_context
slouken@3100
    39
#define WGL_CONTEXT_MAJOR_VERSION_ARB   0x2091
slouken@3100
    40
#define WGL_CONTEXT_MINOR_VERSION_ARB   0x2092
slouken@3100
    41
#define WGL_CONTEXT_LAYER_PLANE_ARB     0x2093
kajetan@6380
    42
#define WGL_CONTEXT_FLAGS_ARB           0x2094
slouken@3100
    43
#define WGL_CONTEXT_DEBUG_BIT_ARB       0x0001
slouken@3100
    44
#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB  0x0002
slouken@6296
    45
slouken@6296
    46
#ifndef WGL_ARB_create_context_profile
slouken@6296
    47
#define WGL_ARB_create_context_profile
slouken@6296
    48
#define WGL_CONTEXT_PROFILE_MASK_ARB              0x9126
slouken@6296
    49
#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB          0x00000001
slouken@6296
    50
#define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
slouken@6296
    51
#endif
slouken@6296
    52
slouken@6296
    53
#ifndef WGL_ARB_create_context_robustness
slouken@6296
    54
#define WGL_ARB_create_context_robustness
slouken@6296
    55
#define WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB         0x00000004
slouken@6296
    56
#define WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB     0x8256
slouken@6296
    57
#define WGL_NO_RESET_NOTIFICATION_ARB                   0x8261
slouken@6296
    58
#define WGL_LOSE_CONTEXT_ON_RESET_ARB                   0x8252
slouken@6296
    59
#endif
slouken@6296
    60
#endif
slouken@6296
    61
slouken@6296
    62
#ifndef WGL_EXT_create_context_es2_profile
slouken@6296
    63
#define WGL_EXT_create_context_es2_profile
slouken@6296
    64
#define WGL_CONTEXT_ES2_PROFILE_BIT_EXT           0x00000004
slouken@3100
    65
#endif
slouken@3100
    66
slouken@6393
    67
#ifndef WGL_EXT_create_context_es_profile
slouken@6393
    68
#define WGL_EXT_create_context_es_profile
slouken@6393
    69
#define WGL_CONTEXT_ES_PROFILE_BIT_EXT            0x00000004
slouken@6393
    70
#endif
slouken@6393
    71
icculus@7853
    72
#ifndef WGL_ARB_framebuffer_sRGB
icculus@7853
    73
#define WGL_ARB_framebuffer_sRGB
icculus@7853
    74
#define WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB                0x20A9
icculus@7853
    75
#endif
icculus@7853
    76
slouken@3139
    77
typedef HGLRC(APIENTRYP PFNWGLCREATECONTEXTATTRIBSARBPROC) (HDC hDC,
slouken@3139
    78
                                                            HGLRC
slouken@3139
    79
                                                            hShareContext,
slouken@3139
    80
                                                            const int
slouken@3139
    81
                                                            *attribList);
slouken@1913
    82
slouken@1913
    83
int
slouken@1913
    84
WIN_GL_LoadLibrary(_THIS, const char *path)
slouken@1913
    85
{
slouken@7865
    86
    void *handle;
slouken@1913
    87
slouken@1913
    88
    if (path == NULL) {
slouken@1952
    89
        path = SDL_getenv("SDL_OPENGL_LIBRARY");
slouken@1952
    90
    }
slouken@1952
    91
    if (path == NULL) {
slouken@1952
    92
        path = DEFAULT_OPENGL;
slouken@1913
    93
    }
slouken@7865
    94
    _this->gl_config.dll_handle = SDL_LoadObject(path);
slouken@3057
    95
    if (!_this->gl_config.dll_handle) {
slouken@7865
    96
        return -1;
slouken@1913
    97
    }
slouken@3057
    98
    SDL_strlcpy(_this->gl_config.driver_path, path,
slouken@3057
    99
                SDL_arraysize(_this->gl_config.driver_path));
slouken@3057
   100
slouken@3057
   101
    /* Allocate OpenGL memory */
slouken@7865
   102
    _this->gl_data = (struct SDL_GLDriverData *) SDL_calloc(1, sizeof(struct SDL_GLDriverData));
slouken@3057
   103
    if (!_this->gl_data) {
icculus@7037
   104
        return SDL_OutOfMemory();
slouken@3057
   105
    }
slouken@1913
   106
slouken@1913
   107
    /* Load function pointers */
slouken@3057
   108
    handle = _this->gl_config.dll_handle;
slouken@1913
   109
    _this->gl_data->wglGetProcAddress = (void *(WINAPI *) (const char *))
slouken@7865
   110
        SDL_LoadFunction(handle, "wglGetProcAddress");
slouken@1913
   111
    _this->gl_data->wglCreateContext = (HGLRC(WINAPI *) (HDC))
slouken@7865
   112
        SDL_LoadFunction(handle, "wglCreateContext");
slouken@1913
   113
    _this->gl_data->wglDeleteContext = (BOOL(WINAPI *) (HGLRC))
slouken@7865
   114
        SDL_LoadFunction(handle, "wglDeleteContext");
slouken@1913
   115
    _this->gl_data->wglMakeCurrent = (BOOL(WINAPI *) (HDC, HGLRC))
slouken@7865
   116
        SDL_LoadFunction(handle, "wglMakeCurrent");
slouken@6393
   117
    _this->gl_data->wglShareLists = (BOOL(WINAPI *) (HGLRC, HGLRC))
slouken@7865
   118
        SDL_LoadFunction(handle, "wglShareLists");
slouken@1913
   119
slouken@1913
   120
    if (!_this->gl_data->wglGetProcAddress ||
slouken@1913
   121
        !_this->gl_data->wglCreateContext ||
slouken@1913
   122
        !_this->gl_data->wglDeleteContext ||
slouken@1913
   123
        !_this->gl_data->wglMakeCurrent) {
icculus@7037
   124
        return SDL_SetError("Could not retrieve OpenGL functions");
slouken@1913
   125
    }
slouken@1913
   126
slouken@1913
   127
    return 0;
slouken@1913
   128
}
slouken@1913
   129
slouken@1913
   130
void *
slouken@1913
   131
WIN_GL_GetProcAddress(_THIS, const char *proc)
slouken@1913
   132
{
slouken@1913
   133
    void *func;
slouken@1913
   134
slouken@1913
   135
    /* This is to pick up extensions */
slouken@1913
   136
    func = _this->gl_data->wglGetProcAddress(proc);
slouken@1913
   137
    if (!func) {
slouken@1913
   138
        /* This is probably a normal GL function */
slouken@1913
   139
        func = GetProcAddress(_this->gl_config.dll_handle, proc);
slouken@1913
   140
    }
slouken@1913
   141
    return func;
slouken@1913
   142
}
slouken@1913
   143
slouken@3057
   144
void
slouken@1913
   145
WIN_GL_UnloadLibrary(_THIS)
slouken@1913
   146
{
slouken@7865
   147
    SDL_UnloadObject(_this->gl_config.dll_handle);
slouken@3057
   148
    _this->gl_config.dll_handle = NULL;
slouken@3057
   149
slouken@3057
   150
    /* Free OpenGL memory */
slouken@3057
   151
    SDL_free(_this->gl_data);
slouken@3057
   152
    _this->gl_data = NULL;
slouken@1913
   153
}
slouken@1913
   154
slouken@1913
   155
static void
slouken@1913
   156
WIN_GL_SetupPixelFormat(_THIS, PIXELFORMATDESCRIPTOR * pfd)
slouken@1913
   157
{
slouken@1913
   158
    SDL_zerop(pfd);
slouken@1913
   159
    pfd->nSize = sizeof(*pfd);
slouken@1913
   160
    pfd->nVersion = 1;
slouken@1913
   161
    pfd->dwFlags = (PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL);
slouken@1913
   162
    if (_this->gl_config.double_buffer) {
slouken@1913
   163
        pfd->dwFlags |= PFD_DOUBLEBUFFER;
slouken@1913
   164
    }
slouken@1913
   165
    if (_this->gl_config.stereo) {
slouken@1913
   166
        pfd->dwFlags |= PFD_STEREO;
slouken@1913
   167
    }
slouken@1913
   168
    pfd->iLayerType = PFD_MAIN_PLANE;
slouken@1913
   169
    pfd->iPixelType = PFD_TYPE_RGBA;
slouken@1913
   170
    pfd->cRedBits = _this->gl_config.red_size;
slouken@1913
   171
    pfd->cGreenBits = _this->gl_config.green_size;
slouken@1913
   172
    pfd->cBlueBits = _this->gl_config.blue_size;
slouken@1913
   173
    pfd->cAlphaBits = _this->gl_config.alpha_size;
slouken@1913
   174
    if (_this->gl_config.buffer_size) {
slouken@1913
   175
        pfd->cColorBits =
slouken@1913
   176
            _this->gl_config.buffer_size - _this->gl_config.alpha_size;
slouken@1913
   177
    } else {
slouken@1913
   178
        pfd->cColorBits = (pfd->cRedBits + pfd->cGreenBits + pfd->cBlueBits);
slouken@1913
   179
    }
slouken@1913
   180
    pfd->cAccumRedBits = _this->gl_config.accum_red_size;
slouken@1913
   181
    pfd->cAccumGreenBits = _this->gl_config.accum_green_size;
slouken@1913
   182
    pfd->cAccumBlueBits = _this->gl_config.accum_blue_size;
slouken@1913
   183
    pfd->cAccumAlphaBits = _this->gl_config.accum_alpha_size;
slouken@1913
   184
    pfd->cAccumBits =
slouken@1913
   185
        (pfd->cAccumRedBits + pfd->cAccumGreenBits + pfd->cAccumBlueBits +
slouken@1913
   186
         pfd->cAccumAlphaBits);
slouken@1913
   187
    pfd->cDepthBits = _this->gl_config.depth_size;
slouken@1913
   188
    pfd->cStencilBits = _this->gl_config.stencil_size;
slouken@1913
   189
}
slouken@1913
   190
slouken@2150
   191
/* Choose the closest pixel format that meets or exceeds the target.
slouken@2150
   192
   FIXME: Should we weight any particular attribute over any other?
slouken@2150
   193
*/
slouken@2150
   194
static int
slouken@2150
   195
WIN_GL_ChoosePixelFormat(HDC hdc, PIXELFORMATDESCRIPTOR * target)
slouken@2150
   196
{
slouken@2150
   197
    PIXELFORMATDESCRIPTOR pfd;
slouken@2150
   198
    int count, index, best = 0;
slouken@2150
   199
    unsigned int dist, best_dist = ~0U;
slouken@2150
   200
slouken@2150
   201
    count = DescribePixelFormat(hdc, 1, sizeof(pfd), NULL);
slouken@2150
   202
slouken@2150
   203
    for (index = 1; index <= count; index++) {
slouken@2150
   204
slouken@2150
   205
        if (!DescribePixelFormat(hdc, index, sizeof(pfd), &pfd)) {
slouken@2150
   206
            continue;
slouken@2150
   207
        }
slouken@2150
   208
slouken@2150
   209
        if ((pfd.dwFlags & target->dwFlags) != target->dwFlags) {
slouken@2150
   210
            continue;
slouken@2150
   211
        }
slouken@2150
   212
slouken@2150
   213
        if (pfd.iLayerType != target->iLayerType) {
slouken@2150
   214
            continue;
slouken@2150
   215
        }
slouken@2150
   216
        if (pfd.iPixelType != target->iPixelType) {
slouken@2150
   217
            continue;
slouken@2150
   218
        }
slouken@2150
   219
slouken@2150
   220
        dist = 0;
slouken@2150
   221
slouken@2150
   222
        if (pfd.cColorBits < target->cColorBits) {
slouken@2150
   223
            continue;
slouken@2150
   224
        } else {
slouken@2150
   225
            dist += (pfd.cColorBits - target->cColorBits);
slouken@2150
   226
        }
slouken@2150
   227
        if (pfd.cRedBits < target->cRedBits) {
slouken@2150
   228
            continue;
slouken@2150
   229
        } else {
slouken@2150
   230
            dist += (pfd.cRedBits - target->cRedBits);
slouken@2150
   231
        }
slouken@2150
   232
        if (pfd.cGreenBits < target->cGreenBits) {
slouken@2150
   233
            continue;
slouken@2150
   234
        } else {
slouken@2150
   235
            dist += (pfd.cGreenBits - target->cGreenBits);
slouken@2150
   236
        }
slouken@2150
   237
        if (pfd.cBlueBits < target->cBlueBits) {
slouken@2150
   238
            continue;
slouken@2150
   239
        } else {
slouken@2150
   240
            dist += (pfd.cBlueBits - target->cBlueBits);
slouken@2150
   241
        }
slouken@2150
   242
        if (pfd.cAlphaBits < target->cAlphaBits) {
slouken@2150
   243
            continue;
slouken@2150
   244
        } else {
slouken@2150
   245
            dist += (pfd.cAlphaBits - target->cAlphaBits);
slouken@2150
   246
        }
slouken@2150
   247
        if (pfd.cAccumBits < target->cAccumBits) {
slouken@2150
   248
            continue;
slouken@2150
   249
        } else {
slouken@2150
   250
            dist += (pfd.cAccumBits - target->cAccumBits);
slouken@2150
   251
        }
slouken@2150
   252
        if (pfd.cAccumRedBits < target->cAccumRedBits) {
slouken@2150
   253
            continue;
slouken@2150
   254
        } else {
slouken@2150
   255
            dist += (pfd.cAccumRedBits - target->cAccumRedBits);
slouken@2150
   256
        }
slouken@2150
   257
        if (pfd.cAccumGreenBits < target->cAccumGreenBits) {
slouken@2150
   258
            continue;
slouken@2150
   259
        } else {
slouken@2150
   260
            dist += (pfd.cAccumGreenBits - target->cAccumGreenBits);
slouken@2150
   261
        }
slouken@2150
   262
        if (pfd.cAccumBlueBits < target->cAccumBlueBits) {
slouken@2150
   263
            continue;
slouken@2150
   264
        } else {
slouken@2150
   265
            dist += (pfd.cAccumBlueBits - target->cAccumBlueBits);
slouken@2150
   266
        }
slouken@2150
   267
        if (pfd.cAccumAlphaBits < target->cAccumAlphaBits) {
slouken@2150
   268
            continue;
slouken@2150
   269
        } else {
slouken@2150
   270
            dist += (pfd.cAccumAlphaBits - target->cAccumAlphaBits);
slouken@2150
   271
        }
slouken@2150
   272
        if (pfd.cDepthBits < target->cDepthBits) {
slouken@2150
   273
            continue;
slouken@2150
   274
        } else {
slouken@2150
   275
            dist += (pfd.cDepthBits - target->cDepthBits);
slouken@2150
   276
        }
slouken@2150
   277
        if (pfd.cStencilBits < target->cStencilBits) {
slouken@2150
   278
            continue;
slouken@2150
   279
        } else {
slouken@2150
   280
            dist += (pfd.cStencilBits - target->cStencilBits);
slouken@2150
   281
        }
slouken@2150
   282
slouken@2150
   283
        if (dist < best_dist) {
slouken@2150
   284
            best = index;
slouken@2150
   285
            best_dist = dist;
slouken@2150
   286
        }
slouken@2150
   287
    }
slouken@2150
   288
slouken@2150
   289
    return best;
slouken@2150
   290
}
slouken@2150
   291
slouken@1913
   292
static SDL_bool
slouken@1913
   293
HasExtension(const char *extension, const char *extensions)
slouken@1913
   294
{
slouken@1913
   295
    const char *start;
slouken@1913
   296
    const char *where, *terminator;
slouken@1913
   297
slouken@1913
   298
    /* Extension names should not have spaces. */
slouken@1913
   299
    where = SDL_strchr(extension, ' ');
slouken@1913
   300
    if (where || *extension == '\0')
slouken@1913
   301
        return SDL_FALSE;
slouken@1913
   302
slouken@1913
   303
    if (!extensions)
slouken@1913
   304
        return SDL_FALSE;
slouken@1913
   305
slouken@1913
   306
    /* It takes a bit of care to be fool-proof about parsing the
slouken@1913
   307
     * OpenGL extensions string. Don't be fooled by sub-strings,
slouken@1913
   308
     * etc. */
slouken@1913
   309
slouken@1913
   310
    start = extensions;
slouken@1913
   311
slouken@1913
   312
    for (;;) {
slouken@1913
   313
        where = SDL_strstr(start, extension);
slouken@1913
   314
        if (!where)
slouken@1913
   315
            break;
slouken@1913
   316
slouken@1913
   317
        terminator = where + SDL_strlen(extension);
slouken@1913
   318
        if (where == start || *(where - 1) == ' ')
slouken@1913
   319
            if (*terminator == ' ' || *terminator == '\0')
slouken@1913
   320
                return SDL_TRUE;
slouken@1913
   321
slouken@1913
   322
        start = terminator;
slouken@1913
   323
    }
slouken@1913
   324
    return SDL_FALSE;
slouken@1913
   325
}
slouken@1913
   326
gabomdq@8021
   327
void
gabomdq@8021
   328
WIN_GL_InitExtensions(_THIS)
slouken@1913
   329
{
slouken@1913
   330
    const char *(WINAPI * wglGetExtensionsStringARB) (HDC) = 0;
slouken@1913
   331
    const char *extensions;
gabomdq@8021
   332
    HWND hwnd;
gabomdq@8021
   333
    HDC hdc;
gabomdq@8021
   334
    HGLRC hglrc;
gabomdq@8021
   335
    PIXELFORMATDESCRIPTOR pfd;
gabomdq@8021
   336
gabomdq@8021
   337
    hwnd =
gabomdq@8021
   338
        CreateWindow(SDL_Appname, SDL_Appname, (WS_POPUP | WS_DISABLED), 0, 0,
gabomdq@8021
   339
        10, 10, NULL, NULL, SDL_Instance, NULL);
gabomdq@8021
   340
    if (!hwnd) {
gabomdq@8021
   341
        return;
gabomdq@8021
   342
    }
gabomdq@8021
   343
    WIN_PumpEvents(_this);
gabomdq@8021
   344
gabomdq@8021
   345
    hdc = GetDC(hwnd);
gabomdq@8021
   346
gabomdq@8021
   347
    WIN_GL_SetupPixelFormat(_this, &pfd);
gabomdq@8021
   348
gabomdq@8021
   349
    SetPixelFormat(hdc, ChoosePixelFormat(hdc, &pfd), &pfd);
gabomdq@8021
   350
gabomdq@8021
   351
    hglrc = _this->gl_data->wglCreateContext(hdc);
gabomdq@8021
   352
    if (!hglrc) {
gabomdq@8021
   353
        return;
gabomdq@8021
   354
    }
gabomdq@8021
   355
    _this->gl_data->wglMakeCurrent(hdc, hglrc);
slouken@1913
   356
slouken@1913
   357
    wglGetExtensionsStringARB = (const char *(WINAPI *) (HDC))
slouken@1913
   358
        _this->gl_data->wglGetProcAddress("wglGetExtensionsStringARB");
slouken@1913
   359
    if (wglGetExtensionsStringARB) {
slouken@1913
   360
        extensions = wglGetExtensionsStringARB(hdc);
slouken@1913
   361
    } else {
slouken@1913
   362
        extensions = NULL;
slouken@1913
   363
    }
slouken@1913
   364
slouken@1913
   365
    /* Check for WGL_ARB_pixel_format */
icculus@6382
   366
    _this->gl_data->HAS_WGL_ARB_pixel_format = SDL_FALSE;
slouken@1913
   367
    if (HasExtension("WGL_ARB_pixel_format", extensions)) {
slouken@1913
   368
        _this->gl_data->wglChoosePixelFormatARB = (BOOL(WINAPI *)
slouken@1913
   369
                                                   (HDC, const int *,
slouken@1913
   370
                                                    const FLOAT *, UINT,
slouken@1913
   371
                                                    int *, UINT *))
slouken@1913
   372
            WIN_GL_GetProcAddress(_this, "wglChoosePixelFormatARB");
slouken@1913
   373
        _this->gl_data->wglGetPixelFormatAttribivARB =
slouken@1913
   374
            (BOOL(WINAPI *) (HDC, int, int, UINT, const int *, int *))
slouken@1913
   375
            WIN_GL_GetProcAddress(_this, "wglGetPixelFormatAttribivARB");
slouken@1913
   376
slouken@1913
   377
        if ((_this->gl_data->wglChoosePixelFormatARB != NULL) &&
slouken@1913
   378
            (_this->gl_data->wglGetPixelFormatAttribivARB != NULL)) {
icculus@6382
   379
            _this->gl_data->HAS_WGL_ARB_pixel_format = SDL_TRUE;
slouken@1913
   380
        }
slouken@1913
   381
    }
slouken@1913
   382
slouken@1913
   383
    /* Check for WGL_EXT_swap_control */
icculus@6382
   384
    _this->gl_data->HAS_WGL_EXT_swap_control_tear = SDL_FALSE;
slouken@1913
   385
    if (HasExtension("WGL_EXT_swap_control", extensions)) {
slouken@1913
   386
        _this->gl_data->wglSwapIntervalEXT =
slouken@1913
   387
            WIN_GL_GetProcAddress(_this, "wglSwapIntervalEXT");
slouken@1913
   388
        _this->gl_data->wglGetSwapIntervalEXT =
slouken@1913
   389
            WIN_GL_GetProcAddress(_this, "wglGetSwapIntervalEXT");
icculus@6382
   390
        if (HasExtension("WGL_EXT_swap_control_tear", extensions)) {
icculus@6382
   391
            _this->gl_data->HAS_WGL_EXT_swap_control_tear = SDL_TRUE;
icculus@6382
   392
        }
slouken@2178
   393
    } else {
slouken@2178
   394
        _this->gl_data->wglSwapIntervalEXT = NULL;
slouken@2178
   395
        _this->gl_data->wglGetSwapIntervalEXT = NULL;
slouken@1913
   396
    }
gabomdq@8021
   397
gabomdq@8021
   398
    /* Check for WGL_EXT_create_context_es2_profile */
gabomdq@8021
   399
    _this->gl_data->HAS_WGL_EXT_create_context_es2_profile = SDL_FALSE;
gabomdq@8021
   400
    if (HasExtension("WGL_EXT_create_context_es2_profile", extensions)) {
gabomdq@8021
   401
        _this->gl_data->HAS_WGL_EXT_create_context_es2_profile = SDL_TRUE;
gabomdq@8021
   402
    }
gabomdq@8021
   403
gabomdq@8021
   404
    _this->gl_data->wglMakeCurrent(hdc, NULL);
gabomdq@8021
   405
    _this->gl_data->wglDeleteContext(hglrc);
gabomdq@8021
   406
    ReleaseDC(hwnd, hdc);
gabomdq@8021
   407
    DestroyWindow(hwnd);
gabomdq@8021
   408
    WIN_PumpEvents(_this);
slouken@2178
   409
}
slouken@1913
   410
slouken@2178
   411
static int
slouken@2178
   412
WIN_GL_ChoosePixelFormatARB(_THIS, int *iAttribs, float *fAttribs)
slouken@2178
   413
{
slouken@2178
   414
    HWND hwnd;
slouken@2178
   415
    HDC hdc;
slouken@2180
   416
    PIXELFORMATDESCRIPTOR pfd;
slouken@2178
   417
    HGLRC hglrc;
slouken@2178
   418
    int pixel_format = 0;
slouken@2178
   419
    unsigned int matching;
slouken@2178
   420
slouken@2178
   421
    hwnd =
slouken@2178
   422
        CreateWindow(SDL_Appname, SDL_Appname, (WS_POPUP | WS_DISABLED), 0, 0,
slouken@2178
   423
                     10, 10, NULL, NULL, SDL_Instance, NULL);
slouken@2178
   424
    WIN_PumpEvents(_this);
slouken@2178
   425
slouken@2178
   426
    hdc = GetDC(hwnd);
slouken@2178
   427
slouken@2180
   428
    WIN_GL_SetupPixelFormat(_this, &pfd);
slouken@2180
   429
slouken@2180
   430
    SetPixelFormat(hdc, ChoosePixelFormat(hdc, &pfd), &pfd);
slouken@2180
   431
slouken@2178
   432
    hglrc = _this->gl_data->wglCreateContext(hdc);
slouken@1913
   433
    if (hglrc) {
slouken@2178
   434
        _this->gl_data->wglMakeCurrent(hdc, hglrc);
slouken@2178
   435
icculus@6382
   436
        if (_this->gl_data->HAS_WGL_ARB_pixel_format) {
slouken@2178
   437
            _this->gl_data->wglChoosePixelFormatARB(hdc, iAttribs, fAttribs,
slouken@2178
   438
                                                    1, &pixel_format,
slouken@2178
   439
                                                    &matching);
slouken@2178
   440
        }
slouken@2178
   441
icculus@7553
   442
        _this->gl_data->wglMakeCurrent(hdc, NULL);
slouken@1913
   443
        _this->gl_data->wglDeleteContext(hglrc);
slouken@1913
   444
    }
slouken@1913
   445
    ReleaseDC(hwnd, hdc);
slouken@1913
   446
    DestroyWindow(hwnd);
slouken@1913
   447
    WIN_PumpEvents(_this);
slouken@2178
   448
slouken@2178
   449
    return pixel_format;
slouken@1913
   450
}
slouken@1913
   451
icculus@7559
   452
/* actual work of WIN_GL_SetupWindow() happens here. */
icculus@7559
   453
static int
icculus@7559
   454
WIN_GL_SetupWindowInternal(_THIS, SDL_Window * window)
slouken@1913
   455
{
slouken@1913
   456
    HDC hdc = ((SDL_WindowData *) window->driverdata)->hdc;
slouken@1913
   457
    PIXELFORMATDESCRIPTOR pfd;
slouken@6296
   458
    int pixel_format = 0;
slouken@1913
   459
    int iAttribs[64];
slouken@1913
   460
    int *iAttr;
icculus@7401
   461
    int *iAccelAttr;
slouken@1913
   462
    float fAttribs[1] = { 0 };
slouken@1913
   463
slouken@1913
   464
    WIN_GL_SetupPixelFormat(_this, &pfd);
slouken@1913
   465
slouken@1913
   466
    /* setup WGL_ARB_pixel_format attribs */
slouken@1913
   467
    iAttr = &iAttribs[0];
slouken@1913
   468
slouken@1913
   469
    *iAttr++ = WGL_DRAW_TO_WINDOW_ARB;
slouken@1913
   470
    *iAttr++ = GL_TRUE;
slouken@1913
   471
    *iAttr++ = WGL_RED_BITS_ARB;
slouken@1913
   472
    *iAttr++ = _this->gl_config.red_size;
slouken@1913
   473
    *iAttr++ = WGL_GREEN_BITS_ARB;
slouken@1913
   474
    *iAttr++ = _this->gl_config.green_size;
slouken@1913
   475
    *iAttr++ = WGL_BLUE_BITS_ARB;
slouken@1913
   476
    *iAttr++ = _this->gl_config.blue_size;
slouken@1913
   477
slouken@1913
   478
    if (_this->gl_config.alpha_size) {
slouken@1913
   479
        *iAttr++ = WGL_ALPHA_BITS_ARB;
slouken@1913
   480
        *iAttr++ = _this->gl_config.alpha_size;
slouken@1913
   481
    }
slouken@1913
   482
slouken@1913
   483
    *iAttr++ = WGL_DOUBLE_BUFFER_ARB;
slouken@1913
   484
    *iAttr++ = _this->gl_config.double_buffer;
slouken@1913
   485
slouken@1913
   486
    *iAttr++ = WGL_DEPTH_BITS_ARB;
slouken@1913
   487
    *iAttr++ = _this->gl_config.depth_size;
slouken@1913
   488
slouken@1913
   489
    if (_this->gl_config.stencil_size) {
slouken@1913
   490
        *iAttr++ = WGL_STENCIL_BITS_ARB;
slouken@1913
   491
        *iAttr++ = _this->gl_config.stencil_size;
slouken@1913
   492
    }
slouken@1913
   493
slouken@1913
   494
    if (_this->gl_config.accum_red_size) {
slouken@1913
   495
        *iAttr++ = WGL_ACCUM_RED_BITS_ARB;
slouken@1913
   496
        *iAttr++ = _this->gl_config.accum_red_size;
slouken@1913
   497
    }
slouken@1913
   498
slouken@1913
   499
    if (_this->gl_config.accum_green_size) {
slouken@1913
   500
        *iAttr++ = WGL_ACCUM_GREEN_BITS_ARB;
slouken@1913
   501
        *iAttr++ = _this->gl_config.accum_green_size;
slouken@1913
   502
    }
slouken@1913
   503
slouken@1913
   504
    if (_this->gl_config.accum_blue_size) {
slouken@1913
   505
        *iAttr++ = WGL_ACCUM_BLUE_BITS_ARB;
slouken@1913
   506
        *iAttr++ = _this->gl_config.accum_blue_size;
slouken@1913
   507
    }
slouken@1913
   508
slouken@1913
   509
    if (_this->gl_config.accum_alpha_size) {
slouken@1913
   510
        *iAttr++ = WGL_ACCUM_ALPHA_BITS_ARB;
slouken@1913
   511
        *iAttr++ = _this->gl_config.accum_alpha_size;
slouken@1913
   512
    }
slouken@1913
   513
slouken@1913
   514
    if (_this->gl_config.stereo) {
slouken@1913
   515
        *iAttr++ = WGL_STEREO_ARB;
slouken@1913
   516
        *iAttr++ = GL_TRUE;
slouken@1913
   517
    }
slouken@1913
   518
slouken@1913
   519
    if (_this->gl_config.multisamplebuffers) {
slouken@1913
   520
        *iAttr++ = WGL_SAMPLE_BUFFERS_ARB;
slouken@1913
   521
        *iAttr++ = _this->gl_config.multisamplebuffers;
slouken@1913
   522
    }
slouken@1913
   523
slouken@1913
   524
    if (_this->gl_config.multisamplesamples) {
slouken@1913
   525
        *iAttr++ = WGL_SAMPLES_ARB;
slouken@1913
   526
        *iAttr++ = _this->gl_config.multisamplesamples;
slouken@1913
   527
    }
slouken@1913
   528
icculus@7853
   529
    if (_this->gl_config.framebuffer_srgb_capable) {
icculus@7853
   530
        *iAttr++ = WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB;
icculus@7853
   531
        *iAttr++ = _this->gl_config.framebuffer_srgb_capable;
icculus@7853
   532
    }
icculus@7853
   533
icculus@7401
   534
    /* We always choose either FULL or NO accel on Windows, because of flaky
icculus@7401
   535
       drivers. If the app didn't specify, we use FULL, because that's
icculus@7401
   536
       probably what they wanted (and if you didn't care and got FULL, that's
icculus@7401
   537
       a perfectly valid result in any case). */
slouken@6296
   538
    *iAttr++ = WGL_ACCELERATION_ARB;
icculus@7401
   539
    iAccelAttr = iAttr;
icculus@7401
   540
    if (_this->gl_config.accelerated) {
icculus@7401
   541
        *iAttr++ = WGL_FULL_ACCELERATION_ARB;
icculus@7401
   542
    } else {
icculus@7401
   543
        *iAttr++ = WGL_NO_ACCELERATION_ARB;
icculus@7401
   544
    }
slouken@1913
   545
slouken@1913
   546
    *iAttr = 0;
slouken@1913
   547
slouken@1913
   548
    /* Choose and set the closest available pixel format */
icculus@7401
   549
    pixel_format = WIN_GL_ChoosePixelFormatARB(_this, iAttribs, fAttribs);
icculus@7401
   550
icculus@7401
   551
    /* App said "don't care about accel" and FULL accel failed. Try NO. */
icculus@7401
   552
    if ( ( !pixel_format ) && ( _this->gl_config.accelerated < 0 ) ) {
icculus@7401
   553
        *iAccelAttr = WGL_NO_ACCELERATION_ARB;
slouken@6296
   554
        pixel_format = WIN_GL_ChoosePixelFormatARB(_this, iAttribs, fAttribs);
icculus@7401
   555
        *iAccelAttr = WGL_FULL_ACCELERATION_ARB;  /* if we try again. */
slouken@6296
   556
    }
slouken@2178
   557
    if (!pixel_format) {
slouken@2150
   558
        pixel_format = WIN_GL_ChoosePixelFormat(hdc, &pfd);
slouken@1913
   559
    }
slouken@1913
   560
    if (!pixel_format) {
icculus@7037
   561
        return SDL_SetError("No matching GL pixel format available");
slouken@1913
   562
    }
slouken@1913
   563
    if (!SetPixelFormat(hdc, pixel_format, &pfd)) {
icculus@7037
   564
        return WIN_SetError("SetPixelFormat()");
slouken@1913
   565
    }
slouken@1913
   566
    return 0;
slouken@1913
   567
}
slouken@1913
   568
icculus@7559
   569
int
icculus@7559
   570
WIN_GL_SetupWindow(_THIS, SDL_Window * window)
icculus@7559
   571
{
icculus@7559
   572
    /* The current context is lost in here; save it and reset it. */
icculus@7559
   573
    SDL_Window *current_win = SDL_GL_GetCurrentWindow();
icculus@7559
   574
    SDL_GLContext current_ctx = SDL_GL_GetCurrentContext();
icculus@7559
   575
    const int retval = WIN_GL_SetupWindowInternal(_this, window);
icculus@7559
   576
    WIN_GL_MakeCurrent(_this, current_win, current_ctx);
icculus@7559
   577
    return retval;
icculus@7559
   578
}
icculus@7559
   579
slouken@1913
   580
SDL_GLContext
slouken@1913
   581
WIN_GL_CreateContext(_THIS, SDL_Window * window)
slouken@1913
   582
{
slouken@1913
   583
    HDC hdc = ((SDL_WindowData *) window->driverdata)->hdc;
slouken@6393
   584
    HGLRC context, share_context;
slouken@1913
   585
gabomdq@8021
   586
    if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES &&
gabomdq@8021
   587
        !_this->gl_data->HAS_WGL_EXT_create_context_es2_profile) {
gabomdq@8022
   588
#if SDL_VIDEO_OPENGL_EGL        
gabomdq@8021
   589
        /* Switch to EGL based functions */
gabomdq@8021
   590
        WIN_GL_UnloadLibrary(_this);
gabomdq@8021
   591
        _this->GL_LoadLibrary = WIN_GLES_LoadLibrary;
gabomdq@8021
   592
        _this->GL_GetProcAddress = WIN_GLES_GetProcAddress;
gabomdq@8021
   593
        _this->GL_UnloadLibrary = WIN_GLES_UnloadLibrary;
gabomdq@8021
   594
        _this->GL_CreateContext = WIN_GLES_CreateContext;
gabomdq@8021
   595
        _this->GL_MakeCurrent = WIN_GLES_MakeCurrent;
gabomdq@8021
   596
        _this->GL_SetSwapInterval = WIN_GLES_SetSwapInterval;
gabomdq@8021
   597
        _this->GL_GetSwapInterval = WIN_GLES_GetSwapInterval;
gabomdq@8021
   598
        _this->GL_SwapWindow = WIN_GLES_SwapWindow;
gabomdq@8021
   599
        _this->GL_DeleteContext = WIN_GLES_DeleteContext;
gabomdq@8021
   600
        
gabomdq@8021
   601
        if (WIN_GLES_LoadLibrary(_this, NULL) != 0) {
gabomdq@8021
   602
            return NULL;
gabomdq@8021
   603
        }
gabomdq@8021
   604
        
gabomdq@8021
   605
        return WIN_GLES_CreateContext(_this, window);
gabomdq@8022
   606
#else
gabomdq@8022
   607
        return SDL_SetError("SDL not configured with EGL support");
gabomdq@8022
   608
#endif        
gabomdq@8021
   609
    }
gabomdq@8021
   610
slouken@6393
   611
    if (_this->gl_config.share_with_current_context) {
slouken@7412
   612
        share_context = (HGLRC)SDL_GL_GetCurrentContext();
slouken@6393
   613
    } else {
slouken@6393
   614
        share_context = 0;
slouken@6393
   615
    }
slouken@6393
   616
slouken@6393
   617
    if (_this->gl_config.major_version < 3 &&
slouken@7191
   618
    _this->gl_config.profile_mask == 0 &&
slouken@7191
   619
    _this->gl_config.flags == 0) {
slouken@6393
   620
        /* Create legacy context */
slouken@3100
   621
        context = _this->gl_data->wglCreateContext(hdc);
slouken@7191
   622
    if( share_context != 0 ) {
icculus@6406
   623
            _this->gl_data->wglShareLists(share_context, context);
slouken@7191
   624
    }
slouken@3100
   625
    } else {
slouken@3100
   626
        PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
slouken@3100
   627
        HGLRC temp_context = _this->gl_data->wglCreateContext(hdc);
slouken@3100
   628
        if (!temp_context) {
slouken@3139
   629
            SDL_SetError("Could not create GL context");
slouken@3100
   630
            return NULL;
slouken@3100
   631
        }
slouken@3139
   632
slouken@3100
   633
        /* Make the context current */
slouken@3100
   634
        if (WIN_GL_MakeCurrent(_this, window, temp_context) < 0) {
slouken@3100
   635
            WIN_GL_DeleteContext(_this, temp_context);
slouken@3100
   636
            return NULL;
slouken@3100
   637
        }
slouken@3139
   638
slouken@3139
   639
        wglCreateContextAttribsARB =
slouken@3139
   640
            (PFNWGLCREATECONTEXTATTRIBSARBPROC) _this->gl_data->
slouken@3139
   641
            wglGetProcAddress("wglCreateContextAttribsARB");
slouken@3100
   642
        if (!wglCreateContextAttribsARB) {
slouken@3100
   643
            SDL_SetError("GL 3.x is not supported");
slouken@3100
   644
            context = temp_context;
slouken@3100
   645
        } else {
slouken@7191
   646
        /* max 8 attributes plus terminator */
slouken@6296
   647
            int attribs[9] = {
slouken@3100
   648
                WGL_CONTEXT_MAJOR_VERSION_ARB, _this->gl_config.major_version,
slouken@3100
   649
                WGL_CONTEXT_MINOR_VERSION_ARB, _this->gl_config.minor_version,
slouken@3139
   650
                0
slouken@3100
   651
            };
slouken@7191
   652
        int iattr = 4;
slouken@6296
   653
slouken@7191
   654
        /* SDL profile bits match WGL profile bits */
slouken@7191
   655
        if( _this->gl_config.profile_mask != 0 ) {
slouken@7191
   656
            attribs[iattr++] = WGL_CONTEXT_PROFILE_MASK_ARB;
slouken@7191
   657
        attribs[iattr++] = _this->gl_config.profile_mask;
slouken@7191
   658
        }
slouken@6296
   659
slouken@7191
   660
        /* SDL flags match WGL flags */
slouken@7191
   661
        if( _this->gl_config.flags != 0 ) {
slouken@7191
   662
            attribs[iattr++] = WGL_CONTEXT_FLAGS_ARB;
slouken@7191
   663
        attribs[iattr++] = _this->gl_config.flags;
slouken@7191
   664
        }
slouken@6296
   665
slouken@7191
   666
        attribs[iattr++] = 0;
slouken@6296
   667
slouken@3100
   668
            /* Create the GL 3.x context */
slouken@6393
   669
            context = wglCreateContextAttribsARB(hdc, share_context, attribs);
slouken@3100
   670
            /* Delete the GL 2.x context */
slouken@3105
   671
            _this->gl_data->wglDeleteContext(temp_context);
slouken@3100
   672
        }
slouken@3100
   673
    }
slouken@3139
   674
slouken@2178
   675
    if (!context) {
slouken@3565
   676
        WIN_SetError("Could not create GL context");
slouken@2178
   677
        return NULL;
slouken@2178
   678
    }
slouken@2178
   679
slouken@2178
   680
    if (WIN_GL_MakeCurrent(_this, window, context) < 0) {
slouken@2178
   681
        WIN_GL_DeleteContext(_this, context);
slouken@2178
   682
        return NULL;
slouken@2178
   683
    }
slouken@2178
   684
slouken@2178
   685
    return context;
slouken@1913
   686
}
slouken@1913
   687
slouken@1913
   688
int
slouken@1913
   689
WIN_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
slouken@1913
   690
{
slouken@1913
   691
    HDC hdc;
slouken@1913
   692
slouken@6522
   693
    if (!_this->gl_data) {
icculus@7037
   694
        return SDL_SetError("OpenGL not initialized");
slouken@6522
   695
    }
slouken@6522
   696
icculus@7553
   697
    /* sanity check that higher level handled this. */
icculus@7553
   698
    SDL_assert(window || (!window && !context));
icculus@7553
   699
icculus@7553
   700
    /* Some Windows drivers freak out if hdc is NULL, even when context is
icculus@7553
   701
       NULL, against spec. Since hdc is _supposed_ to be ignored if context
icculus@7553
   702
       is NULL, we either use the current GL window, or do nothing if we
icculus@7553
   703
       already have no current context. */
icculus@7553
   704
    if (!window) {
icculus@7553
   705
        window = SDL_GL_GetCurrentWindow();
icculus@7553
   706
        if (!window) {
icculus@7553
   707
            SDL_assert(SDL_GL_GetCurrentContext() == NULL);
icculus@7553
   708
            return 0;  /* already done. */
icculus@7553
   709
        }
slouken@1913
   710
    }
icculus@7553
   711
icculus@7553
   712
    hdc = ((SDL_WindowData *) window->driverdata)->hdc;
slouken@1913
   713
    if (!_this->gl_data->wglMakeCurrent(hdc, (HGLRC) context)) {
icculus@7037
   714
        return WIN_SetError("wglMakeCurrent()");
slouken@1913
   715
    }
icculus@7037
   716
    return 0;
slouken@1913
   717
}
slouken@1913
   718
slouken@1913
   719
int
slouken@1913
   720
WIN_GL_SetSwapInterval(_THIS, int interval)
slouken@1913
   721
{
icculus@6382
   722
    if ((interval < 0) && (!_this->gl_data->HAS_WGL_EXT_swap_control_tear)) {
icculus@7037
   723
        return SDL_SetError("Negative swap interval unsupported in this GL");
icculus@6382
   724
    } else if (_this->gl_data->wglSwapIntervalEXT) {
icculus@7037
   725
        if (_this->gl_data->wglSwapIntervalEXT(interval) != TRUE) {
icculus@7037
   726
            return WIN_SetError("wglSwapIntervalEXT()");
icculus@6383
   727
        }
slouken@1913
   728
    } else {
icculus@7037
   729
        return SDL_Unsupported();
slouken@1913
   730
    }
icculus@7037
   731
    return 0;
slouken@1913
   732
}
slouken@1913
   733
slouken@1913
   734
int
slouken@1913
   735
WIN_GL_GetSwapInterval(_THIS)
slouken@1913
   736
{
icculus@6383
   737
    int retval = 0;
slouken@1913
   738
    if (_this->gl_data->wglGetSwapIntervalEXT) {
icculus@6383
   739
        retval = _this->gl_data->wglGetSwapIntervalEXT();
slouken@1913
   740
    }
icculus@6383
   741
    return retval;
slouken@1913
   742
}
slouken@1913
   743
slouken@1913
   744
void
slouken@1913
   745
WIN_GL_SwapWindow(_THIS, SDL_Window * window)
slouken@1913
   746
{
slouken@1913
   747
    HDC hdc = ((SDL_WindowData *) window->driverdata)->hdc;
slouken@1913
   748
slouken@1913
   749
    SwapBuffers(hdc);
slouken@1913
   750
}
slouken@1913
   751
slouken@1913
   752
void
slouken@1913
   753
WIN_GL_DeleteContext(_THIS, SDL_GLContext context)
slouken@1913
   754
{
slouken@6522
   755
    if (!_this->gl_data) {
slouken@6522
   756
        return;
slouken@6522
   757
    }
slouken@1936
   758
    _this->gl_data->wglDeleteContext((HGLRC) context);
slouken@1913
   759
}
slouken@1913
   760
slouken@1952
   761
#endif /* SDL_VIDEO_OPENGL_WGL */
slouken@1913
   762
slouken@6044
   763
#endif /* SDL_VIDEO_DRIVER_WINDOWS */
slouken@6044
   764
slouken@1913
   765
/* vi: set ts=4 sw=4 expandtab: */