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Starting on the OpenGL renderer...
author Sam Lantinga <slouken@libsdl.org>
date Wed, 19 Jul 2006 07:18:45 +0000
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children 00816063b9c9
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1917:3f54b3ec5a07 1918:092bd3a019c5
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2006 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 #if SDL_VIDEO_OPENGL
25
26 #include "SDL_win32video.h"
27
28 /* OpenGL renderer implementation */
29
30 static SDL_Renderer *GL_CreateRenderer(SDL_Window * window, Uint32 flags);
31 static int GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
32 static int GL_SetTexturePalette(SDL_Renderer * renderer,
33 SDL_Texture * texture,
34 const SDL_Color * colors, int firstcolor,
35 int ncolors);
36 static int GL_GetTexturePalette(SDL_Renderer * renderer,
37 SDL_Texture * texture, SDL_Color * colors,
38 int firstcolor, int ncolors);
39 static int GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
40 const SDL_Rect * rect, const void *pixels,
41 int pitch);
42 static int GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
43 const SDL_Rect * rect, int markDirty,
44 void **pixels, int *pitch);
45 static void GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
46 static void GL_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
47 int numrects, const SDL_Rect * rects);
48 static int GL_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect,
49 Uint32 color);
50 static int GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
51 const SDL_Rect * srcrect, const SDL_Rect * dstrect,
52 int blendMode, int scaleMode);
53 static void GL_RenderPresent(SDL_Renderer * renderer);
54 static void GL_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);
55 static void GL_DestroyRenderer(SDL_Renderer * renderer);
56
57
58 SDL_RenderDriver GL_RenderDriver = {
59 GL_CreateRenderer,
60 {
61 "opengl",
62 (SDL_Renderer_PresentDiscard | SDL_Renderer_PresentVSync |
63 SDL_Renderer_Accelerated),
64 (SDL_TextureBlendMode_None | SDL_TextureBlendMode_Mask |
65 SDL_TextureBlendMode_Blend | SDL_TextureBlendMode_Add |
66 SDL_TextureBlendMode_Mod),
67 (SDL_TextureScaleMode_None | SDL_TextureScaleMode_Fast |
68 SDL_TextureScaleMode_Best),
69 12,
70 {
71 SDL_PixelFormat_Index8,
72 SDL_PixelFormat_RGB332,
73 SDL_PixelFormat_RGB444,
74 SDL_PixelFormat_RGB555,
75 SDL_PixelFormat_ARGB4444,
76 SDL_PixelFormat_ARGB1555,
77 SDL_PixelFormat_RGB565,
78 SDL_PixelFormat_RGB888,
79 SDL_PixelFormat_ARGB8888,
80 SDL_PixelFormat_ARGB2101010,
81 SDL_PixelFormat_UYVY,
82 SDL_PixelFormat_YUY2},
83 0,
84 0}
85 };
86
87 typedef struct
88 {
89 SDL_GLContext context;
90 SDL_bool beginScene;
91 } GL_RenderData;
92
93 typedef struct
94 {
95 GLuint texture;
96 GLfloat texw;
97 GLfloat texh;
98 void *pixels;
99 int pitch;
100 } GL_TextureData;
101
102 static GLFORMAT
103 PixelFormatToOpenGL(Uint32 format,)
104 {
105 switch (format) {
106 case SDL_PixelFormat_Index8:
107 return GLFMT_P8;
108 case SDL_PixelFormat_RGB332:
109 return GLFMT_R3G3B2;
110 case SDL_PixelFormat_RGB444:
111 return GLFMT_X4R4G4B4;
112 case SDL_PixelFormat_RGB555:
113 return GLFMT_X1R5G5B5;
114 case SDL_PixelFormat_ARGB4444:
115 return GLFMT_A4R4G4B4;
116 case SDL_PixelFormat_ARGB1555:
117 return GLFMT_A1R5G5B5;
118 case SDL_PixelFormat_RGB565:
119 return GLFMT_R5G6B5;
120 case SDL_PixelFormat_RGB888:
121 return GLFMT_X8R8G8B8;
122 case SDL_PixelFormat_ARGB8888:
123 return GLFMT_A8R8G8B8;
124 case SDL_PixelFormat_ARGB2101010:
125 return GLFMT_A2R10G10B10;
126 case SDL_PixelFormat_UYVY:
127 return GLFMT_UYVY;
128 case SDL_PixelFormat_YUY2:
129 return GLFMT_YUY2;
130 default:
131 return GLFMT_UNKNOWN;
132 }
133 }
134
135 void
136 GL_AddRenderDriver(_THIS)
137 {
138 SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
139
140 if (data->d3d) {
141 SDL_AddRenderDriver(0, &GL_RenderDriver);
142 }
143 }
144
145 SDL_Renderer *
146 GL_CreateRenderer(SDL_Window * window, Uint32 flags)
147 {
148 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
149 SDL_VideoData *videodata = (SDL_VideoData *) display->device->driverdata;
150 SDL_WindowData *windowdata = (SDL_WindowData *) window->driverdata;
151 SDL_Renderer *renderer;
152 GL_RenderData *data;
153 HRESULT result;
154 GLPRESENT_PARAMETERS pparams;
155 IDirect3DSwapChain9 *chain;
156
157 if (!(window->flags & SDL_WINDOW_OPENGL)) {
158 SDL_SetError
159 ("The OpenGL renderer can only be used on OpenGL windows");
160 return NULL;
161 }
162
163 renderer = (SDL_Renderer *) SDL_malloc(sizeof(*renderer));
164 if (!renderer) {
165 SDL_OutOfMemory();
166 return NULL;
167 }
168 SDL_zerop(renderer);
169
170 data = (GL_RenderData *) SDL_malloc(sizeof(*data));
171 if (!data) {
172 GL_DestroyRenderer(renderer);
173 SDL_OutOfMemory();
174 return NULL;
175 }
176 SDL_zerop(data);
177
178 renderer->CreateTexture = GL_CreateTexture;
179 renderer->SetTexturePalette = GL_SetTexturePalette;
180 renderer->GetTexturePalette = GL_GetTexturePalette;
181 renderer->UpdateTexture = GL_UpdateTexture;
182 renderer->LockTexture = GL_LockTexture;
183 renderer->UnlockTexture = GL_UnlockTexture;
184 renderer->DirtyTexture = GL_DirtyTexture;
185 renderer->RenderFill = GL_RenderFill;
186 renderer->RenderCopy = GL_RenderCopy;
187 renderer->RenderPresent = GL_RenderPresent;
188 renderer->DestroyTexture = GL_DestroyTexture;
189 renderer->DestroyRenderer = GL_DestroyRenderer;
190 renderer->info = GL_RenderDriver.info;
191 renderer->window = window->id;
192 renderer->driverdata = data;
193
194 renderer->info.flags =
195 (SDL_Renderer_PresentDiscard | SDL_Renderer_Accelerated);
196
197 data->context = SDL_GL_CreateContext(window->id);
198 if (!data->context) {
199 GL_DestroyRenderer(renderer);
200 return NULL;
201 }
202 if (SDL_GL_MakeCurrent(window->id, data->context) < 0) {
203 GL_DestroyRenderer(renderer);
204 return NULL;
205 }
206 data->beginScene = SDL_TRUE;
207
208 if (flags & SDL_Renderer_PresentVSync) {
209 SDL_GL_SetSwapInterval(1);
210 } else {
211 SDL_GL_SetSwapInterval(0);
212 }
213 if (SDL_GL_GetSwapInterval() > 0) {
214 renderer->info.flags |= SDL_Renderer_PresentVSync;
215 }
216
217 /* Set up parameters for rendering */
218 glDisable(GL_DEPTH_TEST);
219 glDisable(GL_CULL_FACE);
220 glEnable(GL_TEXTURE_2D);
221 glMatrixMode(GL_PROJECTION);
222 glLoadIdentity();
223 glMatrixMode(GL_MODELVIEW);
224 glLoadIdentity();
225 glViewport(0, 0, window->w, window->h);
226 glOrtho(0.0, (GLdouble) window->w, (GLdouble) window->h, 0.0, 0.0, 1.0);
227 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
228
229 return renderer;
230 }
231
232 /* Quick utility function for texture creation */
233 static int
234 power_of_two(int input)
235 {
236 int value = 1;
237
238 while (value < input) {
239 value <<= 1;
240 }
241 return value;
242 }
243
244 static int
245 GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
246 {
247 GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
248 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
249 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
250 GL_TextureData *data;
251 GLPOOL pool;
252 HRESULT result;
253
254 data = (GL_TextureData *) SDL_malloc(sizeof(*data));
255 if (!data) {
256 SDL_OutOfMemory();
257 return -1;
258 }
259 SDL_zerop(data);
260
261 texture->driverdata = data;
262
263 if (texture->access == SDL_TextureAccess_Local) {
264 pool = GLPOOL_MANAGED;
265 } else {
266 pool = GLPOOL_DEFAULT;
267 }
268 result =
269 IDirect3DDevice9_CreateTexture(renderdata->device, texture->w,
270 texture->h, 1, 0,
271 PixelFormatToGLFMT(texture->format),
272 pool, &data->texture, NULL);
273 if (FAILED(result)) {
274 SDL_free(data);
275 GL_SetError("CreateTexture()", result);
276 return -1;
277 }
278
279 return 0;
280 }
281
282 static int
283 GL_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
284 const SDL_Color * colors, int firstcolor, int ncolors)
285 {
286 GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
287 GL_TextureData *data = (GL_TextureData *) texture->driverdata;
288
289 return 0;
290 }
291
292 static int
293 GL_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
294 SDL_Color * colors, int firstcolor, int ncolors)
295 {
296 GL_TextureData *data = (GL_TextureData *) texture->driverdata;
297
298 return 0;
299 }
300
301 static int
302 GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
303 const SDL_Rect * rect, const void *pixels, int pitch)
304 {
305 GL_TextureData *data = (GL_TextureData *) texture->driverdata;
306 GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
307 IDirect3DTexture9 *temp;
308 RECT d3drect;
309 GLLOCKED_RECT locked;
310 const Uint8 *src;
311 Uint8 *dst;
312 int row, length;
313 HRESULT result;
314
315 result =
316 IDirect3DDevice9_CreateTexture(renderdata->device, texture->w,
317 texture->h, 1, 0,
318 PixelFormatToGLFMT(texture->format),
319 GLPOOL_SYSTEMMEM, &temp, NULL);
320 if (FAILED(result)) {
321 GL_SetError("CreateTexture()", result);
322 return -1;
323 }
324
325 d3drect.left = rect->x;
326 d3drect.right = rect->x + rect->w;
327 d3drect.top = rect->y;
328 d3drect.bottom = rect->y + rect->h;
329
330 result = IDirect3DTexture9_LockRect(temp, 0, &locked, &d3drect, 0);
331 if (FAILED(result)) {
332 IDirect3DTexture9_Release(temp);
333 GL_SetError("LockRect()", result);
334 return -1;
335 }
336
337 src = pixels;
338 dst = locked.pBits;
339 length = rect->w * SDL_BYTESPERPIXEL(texture->format);
340 for (row = 0; row < rect->h; ++row) {
341 SDL_memcpy(dst, src, length);
342 src += pitch;
343 dst += locked.Pitch;
344 }
345 IDirect3DTexture9_UnlockRect(temp, 0);
346
347 result =
348 IDirect3DDevice9_UpdateTexture(renderdata->device,
349 (IDirect3DBaseTexture9 *) temp,
350 (IDirect3DBaseTexture9 *) data->
351 texture);
352 IDirect3DTexture9_Release(temp);
353 if (FAILED(result)) {
354 GL_SetError("UpdateTexture()", result);
355 return -1;
356 }
357 return 0;
358 }
359
360 static int
361 GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
362 const SDL_Rect * rect, int markDirty, void **pixels,
363 int *pitch)
364 {
365 GL_TextureData *data = (GL_TextureData *) texture->driverdata;
366 RECT d3drect;
367 GLLOCKED_RECT locked;
368 HRESULT result;
369
370 if (texture->access != SDL_TextureAccess_Local) {
371 SDL_SetError("Can't lock remote video memory");
372 return -1;
373 }
374
375 d3drect.left = rect->x;
376 d3drect.right = rect->x + rect->w;
377 d3drect.top = rect->y;
378 d3drect.bottom = rect->y + rect->h;
379
380 result =
381 IDirect3DTexture9_LockRect(data->texture, 0, &locked, &d3drect,
382 markDirty ? 0 : GLLOCK_NO_DIRTY_UPDATE);
383 if (FAILED(result)) {
384 GL_SetError("LockRect()", result);
385 return -1;
386 }
387 *pixels = locked.pBits;
388 *pitch = locked.Pitch;
389 return 0;
390 }
391
392 static void
393 GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
394 {
395 GL_TextureData *data = (GL_TextureData *) texture->driverdata;
396
397 IDirect3DTexture9_UnlockRect(data->texture, 0);
398 }
399
400 static void
401 GL_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture, int numrects,
402 const SDL_Rect * rects)
403 {
404 GL_TextureData *data = (GL_TextureData *) texture->driverdata;
405 RECT d3drect;
406 int i;
407
408 for (i = 0; i < numrects; ++i) {
409 const SDL_Rect *rect = &rects[i];
410
411 d3drect.left = rect->x;
412 d3drect.right = rect->x + rect->w;
413 d3drect.top = rect->y;
414 d3drect.bottom = rect->y + rect->h;
415
416 IDirect3DTexture9_AddDirtyRect(data->texture, &d3drect);
417 }
418 }
419
420 static int
421 GL_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect, Uint32 color)
422 {
423 GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
424 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
425 GLclampf r, g, b, a;
426
427 a = ((GLclampf) ((color >> 24) & 0xFF)) / 255.0f;
428 r = ((GLclampf) ((color >> 16) & 0xFF)) / 255.0f;
429 g = ((GLclampf) ((color >> 8) & 0xFF)) / 255.0f;
430 b = ((GLclampf) (color & 0xFF)) / 255.0f;
431
432 glClearColor(r, g, b, a);
433 glViewport(rect->x, window->h - rect->y, rect->w, rect->h);
434 glClear(GL_COLOR_BUFFER_BIT);
435 glViewport(0, 0, window->w, window->h);
436 return 0;
437 }
438
439 static int
440 GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
441 const SDL_Rect * srcrect, const SDL_Rect * dstrect,
442 int blendMode, int scaleMode)
443 {
444 GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
445 GL_TextureData *texturedata = (GL_TextureData *) texture->driverdata;
446 int minx, miny, maxx, maxy;
447 GLfloat minu, maxu, minv, maxv;
448
449 minx = dstrect->x;
450 miny = dstrect->y;
451 maxx = dstrect->x + dstrect->w;
452 maxy = dstrect->y + dstrect->h;
453
454 minu = (GLfloat) srcrect->x / texture->w;
455 maxu = (GLfloat) (srcrect->x + srcrect->w) / texture->w;
456 minv = (GLfloat) srcrect->y / texture->h;
457 maxv = (GLfloat) (srcrect->y + srcrect->h) / texture->h;
458
459 glBindTexture(GL_TEXTURE_2D, texturedata->texture);
460
461 switch (blendMode) {
462 case SDL_TextureBlendMode_None:
463 glDisable(GL_BLEND);
464 break;
465 case SDL_TextureBlendMode_Mask:
466 case SDL_TextureBlendMode_Blend:
467 glEnable(GL_BLEND);
468 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
469 break;
470 case SDL_TextureBlendMode_Add:
471 glEnable(GL_BLEND);
472 glBlendFunc(GL_SRC_ALPHA, GL_ONE);
473 break;
474 case SDL_TextureBlendMode_Mod:
475 glEnable(GL_BLEND);
476 glBlendFunc(GL_ZERO, GL_SRC_COLOR);
477 break;
478 }
479
480 switch (scaleMode) {
481 case SDL_TextureScaleMode_None:
482 case SDL_TextureScaleMode_Fast:
483 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
484 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
485 break;
486 case SDL_TextureScaleMode_Slow:
487 case SDL_TextureScaleMode_Best:
488 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
489 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
490 break;
491 }
492
493 glBegin(GL_TRIANGLE_STRIP);
494 glTexCoord2f(minu, minv);
495 glVertex2i(minx, miny);
496 glTexCoord2f(maxu, minv);
497 glVertex2i(maxx, miny);
498 glTexCoord2f(minu, maxv);
499 glVertex2i(miny, maxy);
500 glTexCoord2f(maxu, maxv);
501 glVertex2i(maxx, maxy);
502 glEnd();
503
504 return 0;
505 }
506
507 static void
508 GL_RenderPresent(SDL_Renderer * renderer)
509 {
510 SDL_GL_SwapWindow(renderer->window);
511 }
512
513 static void
514 GL_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
515 {
516 GL_TextureData *data = (GL_TextureData *) texture->driverdata;
517
518 if (!data) {
519 return;
520 }
521 if (data->texture) {
522 IDirect3DTexture9_Release(data->texture);
523 }
524 SDL_free(data);
525 texture->driverdata = NULL;
526 }
527
528 void
529 GL_DestroyRenderer(SDL_Renderer * renderer)
530 {
531 GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
532
533 if (data) {
534 if (data->device) {
535 IDirect3DDevice9_Release(data->device);
536 }
537 SDL_free(data);
538 }
539 SDL_free(renderer);
540 }
541
542 #endif /* SDL_VIDEO_OPENGL */
543
544 /* vi: set ts=4 sw=4 expandtab: */