This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_renderer_sw.c
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2010 Sam Lantinga
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_video.h"
#include "SDL_sysvideo.h"
26
#include "SDL_pixels_c.h"
27
28
#include "SDL_rect_c.h"
#include "SDL_yuv_sw_c.h"
29
#include "SDL_renderer_sw.h"
30
31
32
33
/* SDL surface based renderer implementation */
34
static SDL_Renderer *SW_CreateRenderer(SDL_Window * window, Uint32 flags);
35
36
static void SW_WindowEvent(SDL_Renderer * renderer,
const SDL_WindowEvent *event);
37
38
39
40
41
42
43
44
45
46
47
static int SW_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int SW_QueryTexturePixels(SDL_Renderer * renderer,
SDL_Texture * texture, void **pixels,
int *pitch);
static int SW_SetTexturePalette(SDL_Renderer * renderer,
SDL_Texture * texture,
const SDL_Color * colors, int firstcolor,
int ncolors);
static int SW_GetTexturePalette(SDL_Renderer * renderer,
SDL_Texture * texture, SDL_Color * colors,
int firstcolor, int ncolors);
48
49
50
51
static int SW_SetTextureColorMod(SDL_Renderer * renderer,
SDL_Texture * texture);
static int SW_SetTextureAlphaMod(SDL_Renderer * renderer,
SDL_Texture * texture);
52
53
static int SW_SetTextureBlendMode(SDL_Renderer * renderer,
SDL_Texture * texture);
54
55
56
static int SW_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels,
int pitch);
57
static int SW_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
58
59
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch);
60
static void SW_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
61
62
63
64
65
66
static int SW_RenderDrawPoints(SDL_Renderer * renderer,
const SDL_Point * points, int count);
static int SW_RenderDrawLines(SDL_Renderer * renderer,
const SDL_Point * points, int count);
static int SW_RenderFillRects(SDL_Renderer * renderer,
const SDL_Rect ** rects, int count);
67
static int SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
68
const SDL_Rect * srcrect, const SDL_Rect * dstrect);
69
static int SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
70
Uint32 format, void * pixels, int pitch);
71
static int SW_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
72
Uint32 format, const void * pixels, int pitch);
73
74
75
76
77
78
79
static void SW_RenderPresent(SDL_Renderer * renderer);
static void SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void SW_DestroyRenderer(SDL_Renderer * renderer);
SDL_RenderDriver SW_RenderDriver = {
SW_CreateRenderer,
80
81
{
"software",
82
(SDL_RENDERER_PRESENTVSYNC),
85
86
87
88
89
90
91
92
93
SDL_PIXELFORMAT_INDEX8,
SDL_PIXELFORMAT_RGB555,
SDL_PIXELFORMAT_RGB565,
SDL_PIXELFORMAT_RGB888,
SDL_PIXELFORMAT_BGR888,
SDL_PIXELFORMAT_ARGB8888,
SDL_PIXELFORMAT_RGBA8888,
SDL_PIXELFORMAT_ABGR8888,
SDL_PIXELFORMAT_BGRA8888,
94
95
SDL_PIXELFORMAT_YV12,
SDL_PIXELFORMAT_IYUV,
96
SDL_PIXELFORMAT_YUY2,
97
98
SDL_PIXELFORMAT_UYVY,
SDL_PIXELFORMAT_YVYU},
99
100
101
102
103
104
0,
0}
};
typedef struct
{
105
Uint32 format;
106
SDL_bool updateSize;
107
SDL_Texture *texture;
108
SDL_Surface surface;
109
110
SDL_Renderer *renderer;
SDL_DirtyRectList dirty;
111
} SW_RenderData;
113
114
115
116
117
static SDL_Texture *
CreateTexture(SDL_Renderer * renderer, Uint32 format, int w, int h)
{
SDL_Texture *texture;
118
texture = (SDL_Texture *) SDL_calloc(1, sizeof(*texture));
119
120
121
122
123
124
if (!texture) {
SDL_OutOfMemory();
return NULL;
}
texture->format = format;
125
texture->access = SDL_TEXTUREACCESS_STREAMING;
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
texture->w = w;
texture->h = h;
texture->renderer = renderer;
if (renderer->CreateTexture(renderer, texture) < 0) {
SDL_free(texture);
return NULL;
}
return texture;
}
static void
DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
renderer->DestroyTexture(renderer, texture);
SDL_free(texture);
}
static int
DisplayPaletteChanged(void *userdata, SDL_Palette * palette)
{
147
SW_RenderData *data = (SW_RenderData *) userdata;
149
150
151
152
if (data->renderer->SetTexturePalette) {
data->renderer->SetTexturePalette(data->renderer, data->texture,
palette->colors, 0,
palette->ncolors);
153
154
155
156
}
return 0;
}
157
158
159
160
161
162
163
164
165
void
Setup_SoftwareRenderer(SDL_Renderer * renderer)
{
renderer->CreateTexture = SW_CreateTexture;
renderer->QueryTexturePixels = SW_QueryTexturePixels;
renderer->SetTexturePalette = SW_SetTexturePalette;
renderer->GetTexturePalette = SW_GetTexturePalette;
renderer->SetTextureColorMod = SW_SetTextureColorMod;
renderer->SetTextureAlphaMod = SW_SetTextureAlphaMod;
166
renderer->SetTextureBlendMode = SW_SetTextureBlendMode;
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
renderer->UpdateTexture = SW_UpdateTexture;
renderer->LockTexture = SW_LockTexture;
renderer->UnlockTexture = SW_UnlockTexture;
renderer->DestroyTexture = SW_DestroyTexture;
renderer->info.num_texture_formats =
SW_RenderDriver.info.num_texture_formats;
SDL_memcpy(renderer->info.texture_formats,
SW_RenderDriver.info.texture_formats,
sizeof(renderer->info.texture_formats));;
renderer->info.max_texture_width = SW_RenderDriver.info.max_texture_width;
renderer->info.max_texture_height =
SW_RenderDriver.info.max_texture_height;
}
182
SDL_Renderer *
183
SW_CreateRenderer(SDL_Window * window, Uint32 flags)
185
SDL_VideoDisplay *display = window->display;
186
187
SDL_DisplayMode *displayMode = &display->current_mode;
SDL_Renderer *renderer;
188
SW_RenderData *data;
189
190
191
int i, n;
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
192
Uint32 renderer_flags;
193
const char *desired_driver;
194
195
196
197
198
199
200
201
202
203
204
205
206
if (!SDL_PixelFormatEnumToMasks
(displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
SDL_SetError("Unknown display format");
return NULL;
}
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
207
data = (SW_RenderData *) SDL_calloc(1, sizeof(*data));
208
if (!data) {
209
SW_DestroyRenderer(renderer);
210
211
212
SDL_OutOfMemory();
return NULL;
}
213
renderer->WindowEvent = SW_WindowEvent;
215
216
217
renderer->RenderDrawPoints = SW_RenderDrawPoints;
renderer->RenderDrawLines = SW_RenderDrawLines;
renderer->RenderFillRects = SW_RenderFillRects;
218
renderer->RenderCopy = SW_RenderCopy;
219
220
renderer->RenderReadPixels = SW_RenderReadPixels;
renderer->RenderWritePixels = SW_RenderWritePixels;
221
222
renderer->RenderPresent = SW_RenderPresent;
renderer->DestroyRenderer = SW_DestroyRenderer;
223
224
renderer->info.name = SW_RenderDriver.info.name;
renderer->info.flags = 0;
225
renderer->window = window;
226
renderer->driverdata = data;
227
Setup_SoftwareRenderer(renderer);
230
data->format = displayMode->format;
231
232
/* Find a render driver that we can use to display data */
233
renderer_flags = 0;
234
235
if (flags & SDL_RENDERER_PRESENTVSYNC) {
renderer_flags |= SDL_RENDERER_PRESENTVSYNC;
237
desired_driver = SDL_getenv("SDL_VIDEO_RENDERER_SWDRIVER");
238
239
for (i = 0; i < display->num_render_drivers; ++i) {
SDL_RenderDriver *driver = &display->render_drivers[i];
240
241
242
243
244
245
246
247
248
249
if (driver->info.name == SW_RenderDriver.info.name) {
continue;
}
if (desired_driver
&& SDL_strcasecmp(desired_driver, driver->info.name) != 0) {
continue;
}
data->renderer = driver->CreateRenderer(window, renderer_flags);
if (data->renderer) {
break;
250
251
252
}
}
if (i == display->num_render_drivers) {
253
SW_DestroyRenderer(renderer);
254
255
256
SDL_SetError("Couldn't find display render driver");
return NULL;
}
257
258
if (data->renderer->info.flags & SDL_RENDERER_PRESENTVSYNC) {
renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
259
260
261
}
/* Create the textures we'll use for display */
262
263
264
265
266
data->texture =
CreateTexture(data->renderer, data->format, window->w, window->h);
if (!data->texture) {
SW_DestroyRenderer(renderer);
return NULL;
267
268
269
270
271
272
}
/* Create a surface we'll use for rendering */
data->surface.flags = SDL_PREALLOC;
data->surface.format = SDL_AllocFormat(bpp, Rmask, Gmask, Bmask, Amask);
if (!data->surface.format) {
273
SW_DestroyRenderer(renderer);
274
275
276
277
278
279
280
281
282
return NULL;
}
SDL_SetSurfacePalette(&data->surface, display->palette);
/* Set up a palette watch on the display palette */
if (display->palette) {
SDL_AddPaletteWatch(display->palette, DisplayPaletteChanged, data);
}
283
284
285
return renderer;
}
286
static SDL_Texture *
287
288
289
SW_ActivateRenderer(SDL_Renderer * renderer)
{
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
290
SDL_Window *window = renderer->window;
292
293
if (data->updateSize) {
/* Recreate the textures for the new window size */
294
295
if (data->texture) {
DestroyTexture(data->renderer, data->texture);
297
298
data->texture = CreateTexture(data->renderer, data->format,
window->w, window->h);
299
300
if (data->texture) {
data->updateSize = SDL_FALSE;
303
return data->texture;
306
307
static void
SW_WindowEvent(SDL_Renderer * renderer, const SDL_WindowEvent *event)
308
309
310
{
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
311
312
if (event->event == SDL_WINDOWEVENT_RESIZED) {
data->updateSize = SDL_TRUE;
317
SW_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
318
319
{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
320
321
texture->driverdata =
SDL_SW_CreateYUVTexture(texture->format, texture->w, texture->h);
322
323
324
325
326
327
328
329
330
331
332
333
334
} else {
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
if (!SDL_PixelFormatEnumToMasks
(texture->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
SDL_SetError("Unknown texture format");
return -1;
}
texture->driverdata =
SDL_CreateRGBSurface(0, texture->w, texture->h, bpp, Rmask, Gmask,
Bmask, Amask);
335
336
337
338
339
SDL_SetSurfaceColorMod(texture->driverdata, texture->r, texture->g,
texture->b);
SDL_SetSurfaceAlphaMod(texture->driverdata, texture->a);
SDL_SetSurfaceBlendMode(texture->driverdata, texture->blendMode);
340
341
342
if (texture->access == SDL_TEXTUREACCESS_STATIC) {
SDL_SetSurfaceRLE(texture->driverdata, 1);
}
343
344
345
346
347
348
349
350
351
}
if (!texture->driverdata) {
return -1;
}
return 0;
}
static int
352
353
SW_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
void **pixels, int *pitch)
354
355
{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
356
357
358
return SDL_SW_QueryYUVTexturePixels((SDL_SW_YUVTexture *)
texture->driverdata, pixels,
pitch);
359
360
361
362
363
364
365
366
367
368
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
*pixels = surface->pixels;
*pitch = surface->pitch;
return 0;
}
}
static int
369
370
SW_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Color * colors, int firstcolor, int ncolors)
371
372
373
374
375
376
377
378
379
380
381
382
383
{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
SDL_SetError("YUV textures don't have a palette");
return -1;
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
return SDL_SetPaletteColors(surface->format->palette, colors,
firstcolor, ncolors);
}
}
static int
384
385
SW_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
SDL_Color * colors, int firstcolor, int ncolors)
386
387
388
389
390
391
392
393
394
395
396
397
398
{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
SDL_SetError("YUV textures don't have a palette");
return -1;
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
SDL_memcpy(colors, &surface->format->palette->colors[firstcolor],
ncolors * sizeof(*colors));
return 0;
}
}
399
400
401
static int
SW_SetTextureColorMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
402
403
404
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
return SDL_SetSurfaceColorMod(surface, texture->r, texture->g,
texture->b);
405
406
407
408
409
}
static int
SW_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
410
411
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
return SDL_SetSurfaceAlphaMod(surface, texture->a);
412
413
414
415
416
}
static int
SW_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
417
418
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
return SDL_SetSurfaceBlendMode(surface, texture->blendMode);
422
423
SW_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels, int pitch)
424
425
{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
426
427
428
return SDL_SW_UpdateYUVTexture((SDL_SW_YUVTexture *)
texture->driverdata, rect, pixels,
pitch);
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
Uint8 *src, *dst;
int row;
size_t length;
src = (Uint8 *) pixels;
dst =
(Uint8 *) surface->pixels + rect->y * surface->pitch +
rect->x * surface->format->BytesPerPixel;
length = rect->w * surface->format->BytesPerPixel;
for (row = 0; row < rect->h; ++row) {
SDL_memcpy(dst, src, length);
src += pitch;
dst += surface->pitch;
}
return 0;
}
}
static int
450
451
452
SW_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch)
453
454
{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
455
456
457
return SDL_SW_LockYUVTexture((SDL_SW_YUVTexture *)
texture->driverdata, rect, markDirty,
pixels, pitch);
458
459
460
461
462
463
464
465
466
467
468
469
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
*pixels =
(void *) ((Uint8 *) surface->pixels + rect->y * surface->pitch +
rect->x * surface->format->BytesPerPixel);
*pitch = surface->pitch;
return 0;
}
}
static void
470
SW_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
471
472
473
474
475
476
{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
SDL_SW_UnlockYUVTexture((SDL_SW_YUVTexture *) texture->driverdata);
}
}
477
static int
478
479
SW_RenderDrawPoints(SDL_Renderer * renderer, const SDL_Point * points,
int count)
480
481
{
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
482
SDL_Texture *texture = SW_ActivateRenderer(renderer);
483
SDL_Rect rect;
484
485
486
487
int i;
int x, y;
int status = 0;
488
489
490
491
if (!texture) {
return -1;
}
492
493
494
495
496
497
498
499
500
/* Get the smallest rectangle that contains everything */
rect.x = 0;
rect.y = 0;
rect.w = texture->w;
rect.h = texture->h;
if (!SDL_EnclosePoints(points, count, &rect, &rect)) {
/* Nothing to draw */
return 0;
}
502
if (data->renderer->LockTexture(data->renderer, texture, &rect, 1,
503
504
505
506
507
&data->surface.pixels,
&data->surface.pitch) < 0) {
return -1;
}
508
509
data->surface.clip_rect.w = data->surface.w = rect.w;
data->surface.clip_rect.h = data->surface.h = rect.h;
511
/* Draw the points! */
512
if (renderer->blendMode == SDL_BLENDMODE_NONE) {
513
514
515
516
517
518
519
Uint32 color = SDL_MapRGBA(data->surface.format,
renderer->r, renderer->g, renderer->b,
renderer->a);
for (i = 0; i < count; ++i) {
x = points[i].x - rect.x;
y = points[i].y - rect.y;
521
522
status = SDL_DrawPoint(&data->surface, x, y, color);
}
523
} else {
524
525
526
527
528
529
530
531
532
for (i = 0; i < count; ++i) {
x = points[i].x - rect.x;
y = points[i].y - rect.y;
status = SDL_BlendPoint(&data->surface, x, y,
renderer->blendMode,
renderer->r, renderer->g, renderer->b,
renderer->a);
}
533
534
}
535
536
data->renderer->UnlockTexture(data->renderer, texture);
537
538
539
return status;
}
541
542
SW_RenderDrawLines(SDL_Renderer * renderer, const SDL_Point * points,
int count)
543
544
{
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
545
SDL_Texture *texture = SW_ActivateRenderer(renderer);
546
547
548
549
550
SDL_Rect clip, rect;
int i;
int x1, y1, x2, y2;
int status = 0;
551
552
553
554
if (!texture) {
return -1;
}
555
556
557
558
559
560
561
562
563
/* Get the smallest rectangle that contains everything */
clip.x = 0;
clip.y = 0;
clip.w = texture->w;
clip.h = texture->h;
SDL_EnclosePoints(points, count, NULL, &rect);
if (!SDL_IntersectRect(&rect, &clip, &rect)) {
/* Nothing to draw */
return 0;
566
if (data->renderer->LockTexture(data->renderer, texture, &rect, 1,
567
&data->surface.pixels,
568
569
570
571
&data->surface.pitch) < 0) {
return -1;
}
572
573
data->surface.clip_rect.w = data->surface.w = rect.w;
data->surface.clip_rect.h = data->surface.h = rect.h;
575
/* Draw the points! */
576
if (renderer->blendMode == SDL_BLENDMODE_NONE) {
577
578
579
580
581
582
583
584
585
Uint32 color = SDL_MapRGBA(data->surface.format,
renderer->r, renderer->g, renderer->b,
renderer->a);
for (i = 1; i < count; ++i) {
x1 = points[i-1].x - rect.x;
y1 = points[i-1].y - rect.y;
x2 = points[i].x - rect.x;
y2 = points[i].y - rect.y;
587
588
status = SDL_DrawLine(&data->surface, x1, y1, x2, y2, color);
}
590
591
592
593
594
595
596
597
598
599
600
for (i = 1; i < count; ++i) {
x1 = points[i-1].x - rect.x;
y1 = points[i-1].y - rect.y;
x2 = points[i].x - rect.x;
y2 = points[i].y - rect.y;
status = SDL_BlendLine(&data->surface, x1, y1, x2, y2,
renderer->blendMode,
renderer->r, renderer->g, renderer->b,
renderer->a);
}
603
604
data->renderer->UnlockTexture(data->renderer, texture);
605
606
607
return status;
}
608
609
610
611
612
static int
SW_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
int count)
{
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
613
SDL_Texture *texture = SW_ActivateRenderer(renderer);
614
615
616
617
618
SDL_Rect clip, rect;
Uint32 color = 0;
int i;
int status = 0;
619
620
621
622
if (!texture) {
return -1;
}
623
624
625
626
627
clip.x = 0;
clip.y = 0;
clip.w = texture->w;
clip.h = texture->h;
628
if (renderer->blendMode == SDL_BLENDMODE_NONE) {
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
color = SDL_MapRGBA(data->surface.format,
renderer->r, renderer->g, renderer->b,
renderer->a);
}
for (i = 0; i < count; ++i) {
if (!SDL_IntersectRect(rects[i], &clip, &rect)) {
/* Nothing to draw */
continue;
}
if (data->renderer->LockTexture(data->renderer, texture, &rect, 1,
&data->surface.pixels,
&data->surface.pitch) < 0) {
return -1;
}
data->surface.clip_rect.w = data->surface.w = rect.w;
data->surface.clip_rect.h = data->surface.h = rect.h;
649
if (renderer->blendMode == SDL_BLENDMODE_NONE) {
650
651
652
653
654
655
656
657
658
659
660
661
662
status = SDL_FillRect(&data->surface, NULL, color);
} else {
status = SDL_BlendFillRect(&data->surface, NULL,
renderer->blendMode,
renderer->r, renderer->g, renderer->b,
renderer->a);
}
data->renderer->UnlockTexture(data->renderer, texture);
}
return status;
}
664
SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
665
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
667
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
670
671
672
673
if (!SW_ActivateRenderer(renderer)) {
return -1;
}
674
if (data->renderer->LockTexture(data->renderer, data->texture,
675
676
dstrect, 1, &data->surface.pixels,
&data->surface.pitch) < 0) {
677
678
679
return -1;
}
680
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
681
682
683
684
status =
SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
srcrect, data->format, dstrect->w, dstrect->h,
data->surface.pixels, data->surface.pitch);
685
686
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
687
688
689
690
691
692
693
694
695
696
697
698
SDL_Rect real_srcrect = *srcrect;
SDL_Rect real_dstrect;
data->surface.w = dstrect->w;
data->surface.h = dstrect->h;
data->surface.clip_rect.w = dstrect->w;
data->surface.clip_rect.h = dstrect->h;
real_dstrect = data->surface.clip_rect;
status =
SDL_LowerBlit(surface, &real_srcrect, &data->surface,
&real_dstrect);
700
data->renderer->UnlockTexture(data->renderer, data->texture);
701
return status;
704
705
static int
SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
706
Uint32 format, void * pixels, int pitch)
707
708
709
{
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
710
711
712
713
if (!SW_ActivateRenderer(renderer)) {
return -1;
}
714
if (data->renderer->LockTexture(data->renderer, data->texture,
715
716
717
718
719
rect, 0, &data->surface.pixels,
&data->surface.pitch) < 0) {
return -1;
}
720
721
722
SDL_ConvertPixels(rect->w, rect->h,
data->format, data->surface.pixels, data->surface.pitch,
format, pixels, pitch);
724
data->renderer->UnlockTexture(data->renderer, data->texture);
725
726
727
728
729
return 0;
}
static int
SW_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
730
Uint32 format, const void * pixels, int pitch)
731
732
733
{
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
734
735
736
737
if (!SW_ActivateRenderer(renderer)) {
return -1;
}
738
if (data->renderer->LockTexture(data->renderer, data->texture,
739
740
741
742
743
rect, 1, &data->surface.pixels,
&data->surface.pitch) < 0) {
return -1;
}
744
745
SDL_ConvertPixels(rect->w, rect->h, format, pixels, pitch,
data->format, data->surface.pixels, data->surface.pitch);
747
data->renderer->UnlockTexture(data->renderer, data->texture);
748
749
750
return 0;
}
752
SW_RenderPresent(SDL_Renderer * renderer)
754
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
755
SDL_Texture *texture = SW_ActivateRenderer(renderer);
756
SDL_Rect rect;
758
759
760
761
if (!texture) {
return;
}
762
/* Send the data to the display */
763
764
765
766
767
rect.x = 0;
rect.y = 0;
rect.w = texture->w;
rect.h = texture->h;
data->renderer->RenderCopy(data->renderer, texture, &rect, &rect);
768
769
770
771
data->renderer->RenderPresent(data->renderer);
}
static void
772
SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
773
774
775
776
777
778
779
780
781
782
783
{
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
SDL_SW_DestroyYUVTexture((SDL_SW_YUVTexture *) texture->driverdata);
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
SDL_FreeSurface(surface);
}
}
static void
784
SW_DestroyRenderer(SDL_Renderer * renderer)
786
SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
787
788
SDL_Window *window = renderer->window;
SDL_VideoDisplay *display = window->display;
789
790
791
int i;
if (data) {
792
793
if (data->texture) {
DestroyTexture(data->renderer, data->texture);
795
796
797
798
799
800
801
802
803
804
805
if (data->surface.format) {
SDL_SetSurfacePalette(&data->surface, NULL);
SDL_FreeFormat(data->surface.format);
}
if (display->palette) {
SDL_DelPaletteWatch(display->palette, DisplayPaletteChanged,
data);
}
if (data->renderer) {
data->renderer->DestroyRenderer(data->renderer);
}
806
807
808
809
810
811
812
SDL_FreeDirtyRects(&data->dirty);
SDL_free(data);
}
SDL_free(renderer);
}
/* vi: set ts=4 sw=4 expandtab: */