slouken@0
|
1 |
/*
|
slouken@5535
|
2 |
Simple DirectMedia Layer
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slouken@6885
|
3 |
Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
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slouken@0
|
4 |
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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
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slouken@5535
|
7 |
arising from the use of this software.
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slouken@0
|
8 |
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slouken@5535
|
9 |
Permission is granted to anyone to use this software for any purpose,
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slouken@5535
|
10 |
including commercial applications, and to alter it and redistribute it
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slouken@5535
|
11 |
freely, subject to the following restrictions:
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slouken@0
|
12 |
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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
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slouken@5535
|
15 |
in a product, an acknowledgment in the product documentation would be
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slouken@5535
|
16 |
appreciated but is not required.
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slouken@5535
|
17 |
2. Altered source versions must be plainly marked as such, and must not be
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slouken@5535
|
18 |
misrepresented as being the original software.
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slouken@5535
|
19 |
3. This notice may not be removed or altered from any source distribution.
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slouken@0
|
20 |
*/
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slouken@1402
|
21 |
#include "SDL_config.h"
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slouken@0
|
22 |
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slouken@0
|
23 |
#include "SDL_video.h"
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slouken@0
|
24 |
#include "SDL_sysvideo.h"
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slouken@0
|
25 |
#include "SDL_blit.h"
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slouken@0
|
26 |
#include "SDL_RLEaccel_c.h"
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slouken@0
|
27 |
#include "SDL_pixels_c.h"
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slouken@0
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28 |
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icculus@1251
|
29 |
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slouken@0
|
30 |
/* Public routines */
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slouken@0
|
31 |
/*
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slouken@0
|
32 |
* Create an empty RGB surface of the appropriate depth
|
slouken@0
|
33 |
*/
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slouken@1895
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34 |
SDL_Surface *
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slouken@1895
|
35 |
SDL_CreateRGBSurface(Uint32 flags,
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slouken@1895
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36 |
int width, int height, int depth,
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slouken@1895
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37 |
Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
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slouken@0
|
38 |
{
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slouken@1895
|
39 |
SDL_Surface *surface;
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slouken@5288
|
40 |
Uint32 format;
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slouken@0
|
41 |
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slouken@2807
|
42 |
/* The flags are no longer used, make the compiler happy */
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slouken@4461
|
43 |
(void)flags;
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slouken@2807
|
44 |
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slouken@5288
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45 |
/* Get the pixel format */
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slouken@5288
|
46 |
format = SDL_MasksToPixelFormatEnum(depth, Rmask, Gmask, Bmask, Amask);
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slouken@5288
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47 |
if (format == SDL_PIXELFORMAT_UNKNOWN) {
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slouken@5288
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48 |
SDL_SetError("Unknown pixel format");
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slouken@5288
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49 |
return NULL;
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slouken@5288
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50 |
}
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slouken@5288
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51 |
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slouken@1895
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52 |
/* Allocate the surface */
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slouken@1920
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53 |
surface = (SDL_Surface *) SDL_calloc(1, sizeof(*surface));
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slouken@1895
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54 |
if (surface == NULL) {
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slouken@1895
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55 |
SDL_OutOfMemory();
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slouken@1895
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56 |
return NULL;
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slouken@1895
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57 |
}
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slouken@940
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58 |
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slouken@5288
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59 |
surface->format = SDL_AllocFormat(format);
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slouken@1895
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60 |
if (!surface->format) {
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slouken@1895
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61 |
SDL_FreeSurface(surface);
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slouken@1895
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62 |
return NULL;
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slouken@1895
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63 |
}
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slouken@1895
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64 |
surface->w = width;
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slouken@1895
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surface->h = height;
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slouken@1895
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66 |
surface->pitch = SDL_CalculatePitch(surface);
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slouken@1895
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SDL_SetClipRect(surface, NULL);
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slouken@1895
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slouken@5288
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if (SDL_ISPIXELFORMAT_INDEXED(surface->format->format)) {
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slouken@1895
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70 |
SDL_Palette *palette =
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slouken@1895
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SDL_AllocPalette((1 << surface->format->BitsPerPixel));
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slouken@1895
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72 |
if (!palette) {
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slouken@1895
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73 |
SDL_FreeSurface(surface);
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slouken@1895
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return NULL;
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slouken@1895
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}
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slouken@5438
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if (palette->ncolors == 2) {
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slouken@1895
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/* Create a black and white bitmap palette */
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slouken@1895
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palette->colors[0].r = 0xFF;
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slouken@1895
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palette->colors[0].g = 0xFF;
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slouken@1895
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80 |
palette->colors[0].b = 0xFF;
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slouken@1895
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81 |
palette->colors[1].r = 0x00;
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slouken@1895
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82 |
palette->colors[1].g = 0x00;
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slouken@1895
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83 |
palette->colors[1].b = 0x00;
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slouken@1895
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84 |
}
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slouken@1895
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85 |
SDL_SetSurfacePalette(surface, palette);
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slouken@1895
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SDL_FreePalette(palette);
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slouken@1895
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87 |
}
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slouken@0
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slouken@1895
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/* Get the pixels */
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slouken@1895
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90 |
if (surface->w && surface->h) {
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slouken@1895
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91 |
surface->pixels = SDL_malloc(surface->h * surface->pitch);
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slouken@1895
|
92 |
if (!surface->pixels) {
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slouken@1895
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93 |
SDL_FreeSurface(surface);
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slouken@1895
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94 |
SDL_OutOfMemory();
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slouken@1895
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95 |
return NULL;
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slouken@1895
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96 |
}
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slouken@1895
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97 |
/* This is important for bitmaps */
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slouken@1895
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98 |
SDL_memset(surface->pixels, 0, surface->h * surface->pitch);
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slouken@1895
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99 |
}
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slouken@0
|
100 |
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slouken@1895
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101 |
/* Allocate an empty mapping */
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slouken@1895
|
102 |
surface->map = SDL_AllocBlitMap();
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slouken@1895
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103 |
if (!surface->map) {
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slouken@1895
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104 |
SDL_FreeSurface(surface);
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slouken@1895
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105 |
return NULL;
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slouken@1895
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106 |
}
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slouken@1895
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107 |
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slouken@2267
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108 |
/* By default surface with an alpha mask are set up for blending */
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slouken@2267
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109 |
if (Amask) {
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slouken@2884
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110 |
SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND);
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slouken@2267
|
111 |
}
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slouken@2267
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112 |
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slouken@1895
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113 |
/* The surface is ready to go */
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slouken@1895
|
114 |
surface->refcount = 1;
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slouken@1895
|
115 |
return surface;
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slouken@0
|
116 |
}
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slouken@1895
|
117 |
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slouken@0
|
118 |
/*
|
slouken@0
|
119 |
* Create an RGB surface from an existing memory buffer
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slouken@0
|
120 |
*/
|
slouken@1895
|
121 |
SDL_Surface *
|
slouken@1895
|
122 |
SDL_CreateRGBSurfaceFrom(void *pixels,
|
slouken@1895
|
123 |
int width, int height, int depth, int pitch,
|
slouken@1895
|
124 |
Uint32 Rmask, Uint32 Gmask, Uint32 Bmask,
|
slouken@1895
|
125 |
Uint32 Amask)
|
slouken@0
|
126 |
{
|
slouken@1895
|
127 |
SDL_Surface *surface;
|
slouken@1895
|
128 |
|
slouken@1895
|
129 |
surface =
|
slouken@1895
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130 |
SDL_CreateRGBSurface(0, 0, 0, depth, Rmask, Gmask, Bmask, Amask);
|
slouken@1895
|
131 |
if (surface != NULL) {
|
slouken@1895
|
132 |
surface->flags |= SDL_PREALLOC;
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slouken@1895
|
133 |
surface->pixels = pixels;
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slouken@1895
|
134 |
surface->w = width;
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slouken@1895
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135 |
surface->h = height;
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slouken@1895
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136 |
surface->pitch = pitch;
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slouken@1895
|
137 |
SDL_SetClipRect(surface, NULL);
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slouken@1895
|
138 |
}
|
slouken@1895
|
139 |
return surface;
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slouken@1895
|
140 |
}
|
slouken@1895
|
141 |
|
slouken@1895
|
142 |
int
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slouken@1895
|
143 |
SDL_SetSurfacePalette(SDL_Surface * surface, SDL_Palette * palette)
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slouken@1895
|
144 |
{
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slouken@5288
|
145 |
if (!surface) {
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icculus@7037
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146 |
return SDL_SetError("SDL_SetSurfacePalette() passed a NULL surface");
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slouken@1895
|
147 |
}
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slouken@5288
|
148 |
return SDL_SetPixelFormatPalette(surface->format, palette);
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slouken@1895
|
149 |
}
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slouken@1895
|
150 |
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slouken@2267
|
151 |
int
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slouken@2267
|
152 |
SDL_SetSurfaceRLE(SDL_Surface * surface, int flag)
|
slouken@0
|
153 |
{
|
slouken@2267
|
154 |
int flags;
|
slouken@0
|
155 |
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slouken@2266
|
156 |
if (!surface) {
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slouken@2266
|
157 |
return -1;
|
slouken@1895
|
158 |
}
|
slouken@0
|
159 |
|
slouken@2267
|
160 |
flags = surface->map->info.flags;
|
slouken@1895
|
161 |
if (flag) {
|
slouken@2267
|
162 |
surface->map->info.flags |= SDL_COPY_RLE_DESIRED;
|
slouken@1895
|
163 |
} else {
|
slouken@2267
|
164 |
surface->map->info.flags &= ~SDL_COPY_RLE_DESIRED;
|
slouken@1895
|
165 |
}
|
slouken@2267
|
166 |
if (surface->map->info.flags != flags) {
|
slouken@2266
|
167 |
SDL_InvalidateMap(surface->map);
|
slouken@2266
|
168 |
}
|
slouken@2266
|
169 |
return 0;
|
slouken@0
|
170 |
}
|
slouken@1895
|
171 |
|
slouken@2267
|
172 |
int
|
slouken@3560
|
173 |
SDL_SetColorKey(SDL_Surface * surface, int flag, Uint32 key)
|
slouken@0
|
174 |
{
|
slouken@2266
|
175 |
int flags;
|
slouken@0
|
176 |
|
slouken@2266
|
177 |
if (!surface) {
|
slouken@7363
|
178 |
return SDL_InvalidParamError("surface");
|
slouken@7363
|
179 |
}
|
slouken@7363
|
180 |
|
icculus@7482
|
181 |
if (surface->format->palette && key >= ((Uint32) surface->format->palette->ncolors)) {
|
slouken@7363
|
182 |
return SDL_InvalidParamError("key");
|
slouken@2266
|
183 |
}
|
slouken@2266
|
184 |
|
slouken@2266
|
185 |
if (flag & SDL_RLEACCEL) {
|
slouken@2266
|
186 |
SDL_SetSurfaceRLE(surface, 1);
|
slouken@1895
|
187 |
}
|
slouken@0
|
188 |
|
slouken@2266
|
189 |
flags = surface->map->info.flags;
|
slouken@2266
|
190 |
if (flag) {
|
slouken@2266
|
191 |
surface->map->info.flags |= SDL_COPY_COLORKEY;
|
slouken@2266
|
192 |
surface->map->info.colorkey = key;
|
slouken@7023
|
193 |
if (surface->format->palette) {
|
slouken@7024
|
194 |
surface->format->palette->colors[surface->map->info.colorkey].a = SDL_ALPHA_TRANSPARENT;
|
slouken@7025
|
195 |
++surface->format->palette->version;
|
slouken@7025
|
196 |
if (!surface->format->palette->version) {
|
slouken@7025
|
197 |
surface->format->palette->version = 1;
|
slouken@7025
|
198 |
}
|
slouken@7023
|
199 |
}
|
slouken@2266
|
200 |
} else {
|
slouken@7023
|
201 |
if (surface->format->palette) {
|
slouken@7024
|
202 |
surface->format->palette->colors[surface->map->info.colorkey].a = SDL_ALPHA_OPAQUE;
|
slouken@7025
|
203 |
++surface->format->palette->version;
|
slouken@7025
|
204 |
if (!surface->format->palette->version) {
|
slouken@7025
|
205 |
surface->format->palette->version = 1;
|
slouken@7025
|
206 |
}
|
slouken@7023
|
207 |
}
|
slouken@2266
|
208 |
surface->map->info.flags &= ~SDL_COPY_COLORKEY;
|
slouken@2266
|
209 |
}
|
slouken@2266
|
210 |
if (surface->map->info.flags != flags) {
|
slouken@2266
|
211 |
SDL_InvalidateMap(surface->map);
|
slouken@2266
|
212 |
}
|
slouken@2267
|
213 |
|
slouken@2266
|
214 |
return 0;
|
slouken@2266
|
215 |
}
|
slouken@2266
|
216 |
|
slouken@3103
|
217 |
int
|
slouken@3103
|
218 |
SDL_GetColorKey(SDL_Surface * surface, Uint32 * key)
|
slouken@3103
|
219 |
{
|
slouken@3103
|
220 |
if (!surface) {
|
slouken@3103
|
221 |
return -1;
|
slouken@3103
|
222 |
}
|
slouken@3103
|
223 |
|
slouken@3103
|
224 |
if (!(surface->map->info.flags & SDL_COPY_COLORKEY)) {
|
slouken@3103
|
225 |
return -1;
|
slouken@3103
|
226 |
}
|
slouken@3103
|
227 |
|
slouken@3103
|
228 |
if (key) {
|
slouken@3103
|
229 |
*key = surface->map->info.colorkey;
|
slouken@3103
|
230 |
}
|
slouken@3103
|
231 |
return 0;
|
slouken@3103
|
232 |
}
|
slouken@3103
|
233 |
|
slouken@2785
|
234 |
/* This is a fairly slow function to switch from colorkey to alpha */
|
slouken@2787
|
235 |
static void
|
slouken@2786
|
236 |
SDL_ConvertColorkeyToAlpha(SDL_Surface * surface)
|
slouken@2785
|
237 |
{
|
slouken@2786
|
238 |
int x, y;
|
slouken@2785
|
239 |
|
slouken@2786
|
240 |
if (!surface) {
|
slouken@2786
|
241 |
return;
|
slouken@2786
|
242 |
}
|
slouken@2785
|
243 |
|
slouken@2786
|
244 |
if (!(surface->map->info.flags & SDL_COPY_COLORKEY) ||
|
slouken@2786
|
245 |
!surface->format->Amask) {
|
slouken@2786
|
246 |
return;
|
slouken@2786
|
247 |
}
|
slouken@2785
|
248 |
|
slouken@2786
|
249 |
SDL_LockSurface(surface);
|
slouken@2785
|
250 |
|
slouken@2786
|
251 |
switch (surface->format->BytesPerPixel) {
|
slouken@2786
|
252 |
case 2:
|
slouken@2786
|
253 |
{
|
slouken@2786
|
254 |
Uint16 *row, *spot;
|
slouken@2786
|
255 |
Uint16 ckey = (Uint16) surface->map->info.colorkey;
|
slouken@2786
|
256 |
Uint16 mask = (Uint16) (~surface->format->Amask);
|
slouken@2785
|
257 |
|
slouken@7601
|
258 |
/* Ignore alpha in colorkey comparison */
|
slouken@7601
|
259 |
ckey &= mask;
|
slouken@2786
|
260 |
row = (Uint16 *) surface->pixels;
|
slouken@2786
|
261 |
for (y = surface->h; y--;) {
|
slouken@2786
|
262 |
spot = row;
|
slouken@2786
|
263 |
for (x = surface->w; x--;) {
|
slouken@7601
|
264 |
if ((*spot & mask) == ckey) {
|
slouken@2786
|
265 |
*spot &= mask;
|
slouken@2786
|
266 |
}
|
slouken@2786
|
267 |
++spot;
|
slouken@2786
|
268 |
}
|
slouken@2786
|
269 |
row += surface->pitch / 2;
|
slouken@2786
|
270 |
}
|
slouken@2786
|
271 |
}
|
slouken@2786
|
272 |
break;
|
slouken@2786
|
273 |
case 3:
|
slouken@2786
|
274 |
/* FIXME */
|
slouken@2786
|
275 |
break;
|
slouken@2786
|
276 |
case 4:
|
slouken@2786
|
277 |
{
|
slouken@2786
|
278 |
Uint32 *row, *spot;
|
slouken@2786
|
279 |
Uint32 ckey = surface->map->info.colorkey;
|
slouken@2786
|
280 |
Uint32 mask = ~surface->format->Amask;
|
slouken@2785
|
281 |
|
slouken@7601
|
282 |
/* Ignore alpha in colorkey comparison */
|
slouken@7601
|
283 |
ckey &= mask;
|
slouken@2786
|
284 |
row = (Uint32 *) surface->pixels;
|
slouken@2786
|
285 |
for (y = surface->h; y--;) {
|
slouken@2786
|
286 |
spot = row;
|
slouken@2786
|
287 |
for (x = surface->w; x--;) {
|
slouken@7601
|
288 |
if ((*spot & mask) == ckey) {
|
slouken@2786
|
289 |
*spot &= mask;
|
slouken@2786
|
290 |
}
|
slouken@2786
|
291 |
++spot;
|
slouken@2786
|
292 |
}
|
slouken@2786
|
293 |
row += surface->pitch / 4;
|
slouken@2786
|
294 |
}
|
slouken@2786
|
295 |
}
|
slouken@2786
|
296 |
break;
|
slouken@2786
|
297 |
}
|
slouken@2785
|
298 |
|
slouken@2786
|
299 |
SDL_UnlockSurface(surface);
|
slouken@2785
|
300 |
|
slouken@2786
|
301 |
SDL_SetColorKey(surface, 0, 0);
|
slouken@2884
|
302 |
SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND);
|
slouken@2785
|
303 |
}
|
slouken@2785
|
304 |
|
slouken@2267
|
305 |
int
|
slouken@2267
|
306 |
SDL_SetSurfaceColorMod(SDL_Surface * surface, Uint8 r, Uint8 g, Uint8 b)
|
slouken@2266
|
307 |
{
|
slouken@2266
|
308 |
int flags;
|
slouken@2266
|
309 |
|
slouken@2266
|
310 |
if (!surface) {
|
slouken@2266
|
311 |
return -1;
|
slouken@1895
|
312 |
}
|
slouken@0
|
313 |
|
slouken@2266
|
314 |
surface->map->info.r = r;
|
slouken@2266
|
315 |
surface->map->info.g = g;
|
slouken@2266
|
316 |
surface->map->info.b = b;
|
slouken@0
|
317 |
|
slouken@2266
|
318 |
flags = surface->map->info.flags;
|
slouken@2266
|
319 |
if (r != 0xFF || g != 0xFF || b != 0xFF) {
|
slouken@2266
|
320 |
surface->map->info.flags |= SDL_COPY_MODULATE_COLOR;
|
slouken@1895
|
321 |
} else {
|
slouken@2266
|
322 |
surface->map->info.flags &= ~SDL_COPY_MODULATE_COLOR;
|
slouken@1895
|
323 |
}
|
slouken@2266
|
324 |
if (surface->map->info.flags != flags) {
|
slouken@1895
|
325 |
SDL_InvalidateMap(surface->map);
|
slouken@1895
|
326 |
}
|
slouken@2266
|
327 |
return 0;
|
slouken@0
|
328 |
}
|
slouken@1895
|
329 |
|
slouken@2266
|
330 |
|
slouken@2267
|
331 |
int
|
slouken@2267
|
332 |
SDL_GetSurfaceColorMod(SDL_Surface * surface, Uint8 * r, Uint8 * g, Uint8 * b)
|
slouken@431
|
333 |
{
|
slouken@2266
|
334 |
if (!surface) {
|
slouken@1895
|
335 |
return -1;
|
slouken@1895
|
336 |
}
|
slouken@2266
|
337 |
|
slouken@2266
|
338 |
if (r) {
|
slouken@2266
|
339 |
*r = surface->map->info.r;
|
slouken@2266
|
340 |
}
|
slouken@2266
|
341 |
if (g) {
|
slouken@2266
|
342 |
*g = surface->map->info.g;
|
slouken@2266
|
343 |
}
|
slouken@2266
|
344 |
if (b) {
|
slouken@2266
|
345 |
*b = surface->map->info.b;
|
slouken@1895
|
346 |
}
|
slouken@2266
|
347 |
return 0;
|
slouken@2266
|
348 |
}
|
slouken@2266
|
349 |
|
slouken@2267
|
350 |
int
|
slouken@2267
|
351 |
SDL_SetSurfaceAlphaMod(SDL_Surface * surface, Uint8 alpha)
|
slouken@2266
|
352 |
{
|
slouken@2266
|
353 |
int flags;
|
slouken@2266
|
354 |
|
slouken@2266
|
355 |
if (!surface) {
|
slouken@2266
|
356 |
return -1;
|
slouken@1895
|
357 |
}
|
slouken@431
|
358 |
|
slouken@2266
|
359 |
surface->map->info.a = alpha;
|
slouken@2266
|
360 |
|
slouken@2266
|
361 |
flags = surface->map->info.flags;
|
slouken@2266
|
362 |
if (alpha != 0xFF) {
|
slouken@2266
|
363 |
surface->map->info.flags |= SDL_COPY_MODULATE_ALPHA;
|
slouken@2266
|
364 |
} else {
|
slouken@2266
|
365 |
surface->map->info.flags &= ~SDL_COPY_MODULATE_ALPHA;
|
slouken@2266
|
366 |
}
|
slouken@2266
|
367 |
if (surface->map->info.flags != flags) {
|
slouken@2266
|
368 |
SDL_InvalidateMap(surface->map);
|
slouken@1895
|
369 |
}
|
slouken@2266
|
370 |
return 0;
|
slouken@2266
|
371 |
}
|
slouken@2266
|
372 |
|
slouken@2267
|
373 |
int
|
slouken@2267
|
374 |
SDL_GetSurfaceAlphaMod(SDL_Surface * surface, Uint8 * alpha)
|
slouken@2266
|
375 |
{
|
slouken@2266
|
376 |
if (!surface) {
|
slouken@2266
|
377 |
return -1;
|
slouken@1895
|
378 |
}
|
slouken@2266
|
379 |
|
slouken@2266
|
380 |
if (alpha) {
|
slouken@2266
|
381 |
*alpha = surface->map->info.a;
|
slouken@1895
|
382 |
}
|
slouken@1895
|
383 |
return 0;
|
slouken@431
|
384 |
}
|
slouken@0
|
385 |
|
slouken@2267
|
386 |
int
|
slouken@4929
|
387 |
SDL_SetSurfaceBlendMode(SDL_Surface * surface, SDL_BlendMode blendMode)
|
slouken@2266
|
388 |
{
|
slouken@2266
|
389 |
int flags, status;
|
slouken@2266
|
390 |
|
slouken@2266
|
391 |
if (!surface) {
|
slouken@2266
|
392 |
return -1;
|
slouken@2266
|
393 |
}
|
slouken@2266
|
394 |
|
slouken@2266
|
395 |
status = 0;
|
slouken@2266
|
396 |
flags = surface->map->info.flags;
|
slouken@5184
|
397 |
surface->map->info.flags &=
|
slouken@5184
|
398 |
~(SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD);
|
slouken@2266
|
399 |
switch (blendMode) {
|
slouken@2884
|
400 |
case SDL_BLENDMODE_NONE:
|
slouken@2266
|
401 |
break;
|
slouken@2884
|
402 |
case SDL_BLENDMODE_BLEND:
|
slouken@2266
|
403 |
surface->map->info.flags |= SDL_COPY_BLEND;
|
slouken@2266
|
404 |
break;
|
slouken@2884
|
405 |
case SDL_BLENDMODE_ADD:
|
slouken@2266
|
406 |
surface->map->info.flags |= SDL_COPY_ADD;
|
slouken@2266
|
407 |
break;
|
slouken@5184
|
408 |
case SDL_BLENDMODE_MOD:
|
slouken@5184
|
409 |
surface->map->info.flags |= SDL_COPY_MOD;
|
slouken@5184
|
410 |
break;
|
slouken@2266
|
411 |
default:
|
icculus@7037
|
412 |
status = SDL_Unsupported();
|
slouken@2266
|
413 |
break;
|
slouken@2266
|
414 |
}
|
slouken@2266
|
415 |
|
slouken@2266
|
416 |
if (surface->map->info.flags != flags) {
|
slouken@2266
|
417 |
SDL_InvalidateMap(surface->map);
|
slouken@2266
|
418 |
}
|
slouken@2267
|
419 |
|
slouken@2266
|
420 |
return status;
|
slouken@2266
|
421 |
}
|
slouken@2266
|
422 |
|
slouken@2267
|
423 |
int
|
slouken@4929
|
424 |
SDL_GetSurfaceBlendMode(SDL_Surface * surface, SDL_BlendMode *blendMode)
|
slouken@2266
|
425 |
{
|
slouken@2266
|
426 |
if (!surface) {
|
slouken@2266
|
427 |
return -1;
|
slouken@2266
|
428 |
}
|
slouken@2266
|
429 |
|
slouken@2266
|
430 |
if (!blendMode) {
|
slouken@2266
|
431 |
return 0;
|
slouken@2266
|
432 |
}
|
slouken@2266
|
433 |
|
slouken@5184
|
434 |
switch (surface->map->
|
slouken@5184
|
435 |
info.flags & (SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD)) {
|
slouken@2266
|
436 |
case SDL_COPY_BLEND:
|
slouken@2884
|
437 |
*blendMode = SDL_BLENDMODE_BLEND;
|
slouken@2266
|
438 |
break;
|
slouken@2266
|
439 |
case SDL_COPY_ADD:
|
slouken@2884
|
440 |
*blendMode = SDL_BLENDMODE_ADD;
|
slouken@2266
|
441 |
break;
|
slouken@5184
|
442 |
case SDL_COPY_MOD:
|
slouken@5184
|
443 |
*blendMode = SDL_BLENDMODE_MOD;
|
slouken@5184
|
444 |
break;
|
slouken@2266
|
445 |
default:
|
slouken@2884
|
446 |
*blendMode = SDL_BLENDMODE_NONE;
|
slouken@2266
|
447 |
break;
|
slouken@2266
|
448 |
}
|
slouken@2266
|
449 |
return 0;
|
slouken@2266
|
450 |
}
|
slouken@2266
|
451 |
|
slouken@1895
|
452 |
SDL_bool
|
slouken@1895
|
453 |
SDL_SetClipRect(SDL_Surface * surface, const SDL_Rect * rect)
|
slouken@0
|
454 |
{
|
slouken@1895
|
455 |
SDL_Rect full_rect;
|
slouken@0
|
456 |
|
slouken@1895
|
457 |
/* Don't do anything if there's no surface to act on */
|
slouken@1895
|
458 |
if (!surface) {
|
slouken@1895
|
459 |
return SDL_FALSE;
|
slouken@1895
|
460 |
}
|
slouken@1895
|
461 |
|
slouken@1895
|
462 |
/* Set up the full surface rectangle */
|
slouken@1895
|
463 |
full_rect.x = 0;
|
slouken@1895
|
464 |
full_rect.y = 0;
|
slouken@1895
|
465 |
full_rect.w = surface->w;
|
slouken@1895
|
466 |
full_rect.h = surface->h;
|
slouken@0
|
467 |
|
slouken@1895
|
468 |
/* Set the clipping rectangle */
|
slouken@1895
|
469 |
if (!rect) {
|
slouken@1895
|
470 |
surface->clip_rect = full_rect;
|
slouken@4966
|
471 |
return SDL_TRUE;
|
slouken@1895
|
472 |
}
|
slouken@1895
|
473 |
return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect);
|
slouken@1895
|
474 |
}
|
slouken@0
|
475 |
|
slouken@1895
|
476 |
void
|
slouken@1895
|
477 |
SDL_GetClipRect(SDL_Surface * surface, SDL_Rect * rect)
|
slouken@1895
|
478 |
{
|
slouken@1895
|
479 |
if (surface && rect) {
|
slouken@1895
|
480 |
*rect = surface->clip_rect;
|
slouken@1895
|
481 |
}
|
slouken@0
|
482 |
}
|
slouken@1895
|
483 |
|
slouken@7191
|
484 |
/*
|
slouken@0
|
485 |
* Set up a blit between two surfaces -- split into three parts:
|
slouken@7191
|
486 |
* The upper part, SDL_UpperBlit(), performs clipping and rectangle
|
slouken@0
|
487 |
* verification. The lower part is a pointer to a low level
|
slouken@0
|
488 |
* accelerated blitting function.
|
slouken@0
|
489 |
*
|
slouken@7191
|
490 |
* These parts are separated out and each used internally by this
|
slouken@0
|
491 |
* library in the optimimum places. They are exported so that if
|
slouken@0
|
492 |
* you know exactly what you are doing, you can optimize your code
|
slouken@0
|
493 |
* by calling the one(s) you need.
|
slouken@0
|
494 |
*/
|
slouken@1895
|
495 |
int
|
slouken@1895
|
496 |
SDL_LowerBlit(SDL_Surface * src, SDL_Rect * srcrect,
|
slouken@1895
|
497 |
SDL_Surface * dst, SDL_Rect * dstrect)
|
slouken@0
|
498 |
{
|
slouken@1895
|
499 |
/* Check to make sure the blit mapping is valid */
|
slouken@1895
|
500 |
if ((src->map->dst != dst) ||
|
slouken@5288
|
501 |
(dst->format->palette &&
|
slouken@6166
|
502 |
src->map->dst_palette_version != dst->format->palette->version) ||
|
slouken@6166
|
503 |
(src->format->palette &&
|
slouken@6166
|
504 |
src->map->src_palette_version != src->format->palette->version)) {
|
slouken@1895
|
505 |
if (SDL_MapSurface(src, dst) < 0) {
|
slouken@1895
|
506 |
return (-1);
|
slouken@1895
|
507 |
}
|
bob@2328
|
508 |
/* just here for debugging */
|
bob@2329
|
509 |
/* printf */
|
bob@2329
|
510 |
/* ("src = 0x%08X src->flags = %08X src->map->info.flags = %08x\ndst = 0x%08X dst->flags = %08X dst->map->info.flags = %08X\nsrc->map->blit = 0x%08x\n", */
|
bob@2329
|
511 |
/* src, dst->flags, src->map->info.flags, dst, dst->flags, */
|
bob@2329
|
512 |
/* dst->map->info.flags, src->map->blit); */
|
slouken@1895
|
513 |
}
|
slouken@2257
|
514 |
return (src->map->blit(src, srcrect, dst, dstrect));
|
slouken@0
|
515 |
}
|
slouken@0
|
516 |
|
slouken@0
|
517 |
|
slouken@1895
|
518 |
int
|
slouken@4949
|
519 |
SDL_UpperBlit(SDL_Surface * src, const SDL_Rect * srcrect,
|
slouken@1895
|
520 |
SDL_Surface * dst, SDL_Rect * dstrect)
|
slouken@0
|
521 |
{
|
slouken@1895
|
522 |
SDL_Rect fulldst;
|
slouken@1895
|
523 |
int srcx, srcy, w, h;
|
slouken@0
|
524 |
|
slouken@1895
|
525 |
/* Make sure the surfaces aren't locked */
|
slouken@1895
|
526 |
if (!src || !dst) {
|
icculus@7037
|
527 |
return SDL_SetError("SDL_UpperBlit: passed a NULL surface");
|
slouken@1895
|
528 |
}
|
slouken@1895
|
529 |
if (src->locked || dst->locked) {
|
icculus@7037
|
530 |
return SDL_SetError("Surfaces must not be locked during blit");
|
slouken@1895
|
531 |
}
|
slouken@0
|
532 |
|
slouken@1895
|
533 |
/* If the destination rectangle is NULL, use the entire dest surface */
|
slouken@1895
|
534 |
if (dstrect == NULL) {
|
slouken@1895
|
535 |
fulldst.x = fulldst.y = 0;
|
slouken@7511
|
536 |
fulldst.w = dst->w;
|
slouken@7511
|
537 |
fulldst.h = dst->h;
|
slouken@1895
|
538 |
dstrect = &fulldst;
|
slouken@1895
|
539 |
}
|
slouken@1895
|
540 |
|
slouken@1895
|
541 |
/* clip the source rectangle to the source surface */
|
slouken@1895
|
542 |
if (srcrect) {
|
slouken@1895
|
543 |
int maxw, maxh;
|
slouken@0
|
544 |
|
slouken@1895
|
545 |
srcx = srcrect->x;
|
slouken@1895
|
546 |
w = srcrect->w;
|
slouken@1895
|
547 |
if (srcx < 0) {
|
slouken@1895
|
548 |
w += srcx;
|
slouken@1895
|
549 |
dstrect->x -= srcx;
|
slouken@1895
|
550 |
srcx = 0;
|
slouken@1895
|
551 |
}
|
slouken@1895
|
552 |
maxw = src->w - srcx;
|
slouken@1895
|
553 |
if (maxw < w)
|
slouken@1895
|
554 |
w = maxw;
|
slouken@0
|
555 |
|
slouken@1895
|
556 |
srcy = srcrect->y;
|
slouken@1895
|
557 |
h = srcrect->h;
|
slouken@1895
|
558 |
if (srcy < 0) {
|
slouken@1895
|
559 |
h += srcy;
|
slouken@1895
|
560 |
dstrect->y -= srcy;
|
slouken@1895
|
561 |
srcy = 0;
|
slouken@1895
|
562 |
}
|
slouken@1895
|
563 |
maxh = src->h - srcy;
|
slouken@1895
|
564 |
if (maxh < h)
|
slouken@1895
|
565 |
h = maxh;
|
slouken@0
|
566 |
|
slouken@1895
|
567 |
} else {
|
slouken@1895
|
568 |
srcx = srcy = 0;
|
slouken@1895
|
569 |
w = src->w;
|
slouken@1895
|
570 |
h = src->h;
|
slouken@1895
|
571 |
}
|
slouken@1895
|
572 |
|
slouken@1895
|
573 |
/* clip the destination rectangle against the clip rectangle */
|
slouken@1895
|
574 |
{
|
slouken@1895
|
575 |
SDL_Rect *clip = &dst->clip_rect;
|
slouken@1895
|
576 |
int dx, dy;
|
slouken@0
|
577 |
|
slouken@1895
|
578 |
dx = clip->x - dstrect->x;
|
slouken@1895
|
579 |
if (dx > 0) {
|
slouken@1895
|
580 |
w -= dx;
|
slouken@1895
|
581 |
dstrect->x += dx;
|
slouken@1895
|
582 |
srcx += dx;
|
slouken@1895
|
583 |
}
|
slouken@1895
|
584 |
dx = dstrect->x + w - clip->x - clip->w;
|
slouken@1895
|
585 |
if (dx > 0)
|
slouken@1895
|
586 |
w -= dx;
|
slouken@0
|
587 |
|
slouken@1895
|
588 |
dy = clip->y - dstrect->y;
|
slouken@1895
|
589 |
if (dy > 0) {
|
slouken@1895
|
590 |
h -= dy;
|
slouken@1895
|
591 |
dstrect->y += dy;
|
slouken@1895
|
592 |
srcy += dy;
|
slouken@1895
|
593 |
}
|
slouken@1895
|
594 |
dy = dstrect->y + h - clip->y - clip->h;
|
slouken@1895
|
595 |
if (dy > 0)
|
slouken@1895
|
596 |
h -= dy;
|
slouken@1895
|
597 |
}
|
slouken@0
|
598 |
|
slouken@7834
|
599 |
/* Switch back to a fast blit if we were previously stretching */
|
slouken@7834
|
600 |
if (src->map->info.flags & SDL_COPY_NEAREST) {
|
slouken@7834
|
601 |
src->map->info.flags &= ~SDL_COPY_NEAREST;
|
slouken@7834
|
602 |
SDL_InvalidateMap(src->map);
|
slouken@7834
|
603 |
}
|
slouken@7834
|
604 |
|
slouken@1895
|
605 |
if (w > 0 && h > 0) {
|
slouken@1895
|
606 |
SDL_Rect sr;
|
slouken@1895
|
607 |
sr.x = srcx;
|
slouken@1895
|
608 |
sr.y = srcy;
|
slouken@1895
|
609 |
sr.w = dstrect->w = w;
|
slouken@1895
|
610 |
sr.h = dstrect->h = h;
|
slouken@1895
|
611 |
return SDL_LowerBlit(src, &sr, dst, dstrect);
|
slouken@1895
|
612 |
}
|
slouken@1895
|
613 |
dstrect->w = dstrect->h = 0;
|
slouken@1895
|
614 |
return 0;
|
slouken@0
|
615 |
}
|
slouken@0
|
616 |
|
ken@5296
|
617 |
int
|
ken@5499
|
618 |
SDL_UpperBlitScaled(SDL_Surface * src, const SDL_Rect * srcrect,
|
ken@5499
|
619 |
SDL_Surface * dst, SDL_Rect * dstrect)
|
ken@5499
|
620 |
{
|
ken@5499
|
621 |
SDL_Rect final_src, final_dst, fulldst;
|
ken@5499
|
622 |
|
ken@5499
|
623 |
/* Make sure the surfaces aren't locked */
|
ken@5499
|
624 |
if (!src || !dst) {
|
icculus@7037
|
625 |
return SDL_SetError("SDL_UpperBlitScaled: passed a NULL surface");
|
ken@5499
|
626 |
}
|
ken@5499
|
627 |
if (src->locked || dst->locked) {
|
icculus@7037
|
628 |
return SDL_SetError("Surfaces must not be locked during blit");
|
ken@5499
|
629 |
}
|
ken@5499
|
630 |
|
ken@5499
|
631 |
/* If the destination rectangle is NULL, use the entire dest surface */
|
ken@5499
|
632 |
if (dstrect == NULL) {
|
ken@5499
|
633 |
fulldst.x = fulldst.y = 0;
|
jorgen@7508
|
634 |
fulldst.w = dst->w;
|
jorgen@7508
|
635 |
fulldst.h = dst->h;
|
ken@5499
|
636 |
dstrect = &fulldst;
|
ken@5499
|
637 |
}
|
ken@5499
|
638 |
|
ken@5499
|
639 |
/* clip the source rectangle to the source surface */
|
ken@5499
|
640 |
if (srcrect) {
|
ken@5499
|
641 |
int maxw, maxh;
|
ken@5499
|
642 |
|
ken@5499
|
643 |
final_src.x = srcrect->x;
|
ken@5499
|
644 |
final_src.w = srcrect->w;
|
ken@5499
|
645 |
if (final_src.x < 0) {
|
ken@5499
|
646 |
final_src.w += final_src.x;
|
ken@5499
|
647 |
final_src.x = 0;
|
ken@5499
|
648 |
}
|
ken@5499
|
649 |
maxw = src->w - final_src.x;
|
ken@5499
|
650 |
if (maxw < final_src.w)
|
ken@5499
|
651 |
final_src.w = maxw;
|
ken@5499
|
652 |
|
ken@5499
|
653 |
final_src.y = srcrect->y;
|
ken@5499
|
654 |
final_src.h = srcrect->h;
|
ken@5499
|
655 |
if (final_src.y < 0) {
|
ken@5499
|
656 |
final_src.h += final_src.y;
|
ken@5499
|
657 |
final_src.y = 0;
|
ken@5499
|
658 |
}
|
ken@5499
|
659 |
maxh = src->h - final_src.y;
|
ken@5499
|
660 |
if (maxh < final_src.h)
|
ken@5499
|
661 |
final_src.h = maxh;
|
ken@5499
|
662 |
|
ken@5499
|
663 |
} else {
|
ken@5499
|
664 |
final_src.x = final_src.y = 0;
|
ken@5499
|
665 |
final_src.w = src->w;
|
ken@5499
|
666 |
final_src.h = src->h;
|
ken@5499
|
667 |
}
|
ken@5499
|
668 |
|
ken@5499
|
669 |
/* clip the destination rectangle against the clip rectangle */
|
ken@5499
|
670 |
if (dstrect) {
|
ken@5499
|
671 |
int maxw, maxh;
|
ken@5499
|
672 |
|
ken@5499
|
673 |
final_dst.x = dstrect->x;
|
ken@5499
|
674 |
final_dst.w = dstrect->w;
|
ken@5499
|
675 |
if (final_dst.x < 0) {
|
ken@5499
|
676 |
final_dst.w += final_dst.x;
|
ken@5499
|
677 |
final_dst.x = 0;
|
ken@5499
|
678 |
}
|
ken@5499
|
679 |
maxw = dst->w - final_dst.x;
|
ken@5499
|
680 |
if (maxw < final_dst.w)
|
ken@5499
|
681 |
final_dst.w = maxw;
|
ken@5499
|
682 |
|
ken@5499
|
683 |
final_dst.y = dstrect->y;
|
ken@5499
|
684 |
final_dst.h = dstrect->h;
|
ken@5499
|
685 |
if (final_dst.y < 0) {
|
ken@5499
|
686 |
final_dst.h += final_dst.y;
|
ken@5499
|
687 |
final_dst.y = 0;
|
ken@5499
|
688 |
}
|
ken@5499
|
689 |
maxh = dst->h - final_dst.y;
|
ken@5499
|
690 |
if (maxh < final_dst.h)
|
ken@5499
|
691 |
final_dst.h = maxh;
|
ken@5499
|
692 |
} else {
|
ken@5499
|
693 |
final_dst.x = final_dst.y = 0;
|
ken@5499
|
694 |
final_dst.w = dst->w;
|
ken@5499
|
695 |
final_dst.h = dst->h;
|
ken@5499
|
696 |
}
|
ken@5499
|
697 |
|
ken@5499
|
698 |
if (final_dst.w > 0 && final_dst.h > 0) {
|
ken@5499
|
699 |
return SDL_LowerBlitScaled(src, &final_src, dst, &final_dst);
|
ken@5499
|
700 |
}
|
ken@5499
|
701 |
|
ken@5499
|
702 |
return 0;
|
ken@5499
|
703 |
}
|
ken@5499
|
704 |
|
ken@5499
|
705 |
/**
|
ken@5499
|
706 |
* This is a semi-private blit function and it performs low-level surface
|
ken@5499
|
707 |
* scaled blitting only.
|
ken@5499
|
708 |
*/
|
ken@5499
|
709 |
int
|
ken@5499
|
710 |
SDL_LowerBlitScaled(SDL_Surface * src, SDL_Rect * srcrect,
|
ken@5499
|
711 |
SDL_Surface * dst, SDL_Rect * dstrect)
|
ken@5296
|
712 |
{
|
slouken@6526
|
713 |
static const Uint32 complex_copy_flags = (
|
slouken@6526
|
714 |
SDL_COPY_MODULATE_COLOR | SDL_COPY_MODULATE_ALPHA |
|
slouken@6526
|
715 |
SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD |
|
slouken@6526
|
716 |
SDL_COPY_COLORKEY
|
slouken@6526
|
717 |
);
|
slouken@6526
|
718 |
|
ken@5296
|
719 |
/* Save off the original dst width, height */
|
ken@5296
|
720 |
int dstW = dstrect->w;
|
ken@5296
|
721 |
int dstH = dstrect->h;
|
slouken@6527
|
722 |
SDL_Rect full_rect;
|
ken@5296
|
723 |
SDL_Rect final_dst = *dstrect;
|
ken@5296
|
724 |
SDL_Rect final_src = *srcrect;
|
ken@5296
|
725 |
|
ken@5296
|
726 |
/* Clip the dst surface to the dstrect */
|
slouken@6527
|
727 |
full_rect.x = 0;
|
slouken@6527
|
728 |
full_rect.y = 0;
|
slouken@6527
|
729 |
full_rect.w = dst->w;
|
slouken@6527
|
730 |
full_rect.h = dst->h;
|
slouken@6527
|
731 |
if (!SDL_IntersectRect(&final_dst, &full_rect, &final_dst)) {
|
slouken@6527
|
732 |
return 0;
|
slouken@6527
|
733 |
}
|
ken@5296
|
734 |
|
ken@5296
|
735 |
/* Did the dst width change? */
|
slouken@6527
|
736 |
if ( dstW != final_dst.w ) {
|
ken@5296
|
737 |
/* scale the src width appropriately */
|
ken@5296
|
738 |
final_src.w = final_src.w * dst->clip_rect.w / dstW;
|
ken@5296
|
739 |
}
|
ken@5296
|
740 |
|
ken@5296
|
741 |
/* Did the dst height change? */
|
slouken@6527
|
742 |
if ( dstH != final_dst.h ) {
|
ken@5296
|
743 |
/* scale the src width appropriately */
|
ken@5296
|
744 |
final_src.h = final_src.h * dst->clip_rect.h / dstH;
|
ken@5296
|
745 |
}
|
ken@5296
|
746 |
|
ken@5296
|
747 |
/* Clip the src surface to the srcrect */
|
slouken@6527
|
748 |
full_rect.x = 0;
|
slouken@6527
|
749 |
full_rect.y = 0;
|
slouken@6527
|
750 |
full_rect.w = src->w;
|
slouken@6527
|
751 |
full_rect.h = src->h;
|
slouken@6527
|
752 |
if (!SDL_IntersectRect(&final_src, &full_rect, &final_src)) {
|
slouken@6527
|
753 |
return 0;
|
slouken@6527
|
754 |
}
|
ken@5296
|
755 |
|
slouken@7834
|
756 |
if (!(src->map->info.flags & SDL_COPY_NEAREST)) {
|
slouken@7834
|
757 |
src->map->info.flags |= SDL_COPY_NEAREST;
|
slouken@7834
|
758 |
SDL_InvalidateMap(src->map);
|
slouken@7834
|
759 |
}
|
ken@5296
|
760 |
|
slouken@6526
|
761 |
if ( !(src->map->info.flags & complex_copy_flags) &&
|
slouken@7191
|
762 |
src->format->format == dst->format->format &&
|
slouken@6526
|
763 |
!SDL_ISPIXELFORMAT_INDEXED(src->format->format) ) {
|
ken@5296
|
764 |
return SDL_SoftStretch( src, &final_src, dst, &final_dst );
|
ken@5296
|
765 |
} else {
|
ken@5296
|
766 |
return SDL_LowerBlit( src, &final_src, dst, &final_dst );
|
ken@5296
|
767 |
}
|
ken@5296
|
768 |
}
|
ken@5296
|
769 |
|
ken@5296
|
770 |
/*
|
slouken@0
|
771 |
* Lock a surface to directly access the pixels
|
slouken@0
|
772 |
*/
|
slouken@1895
|
773 |
int
|
slouken@1895
|
774 |
SDL_LockSurface(SDL_Surface * surface)
|
slouken@0
|
775 |
{
|
slouken@1895
|
776 |
if (!surface->locked) {
|
slouken@1895
|
777 |
/* Perform the lock */
|
slouken@1895
|
778 |
if (surface->flags & SDL_RLEACCEL) {
|
slouken@1895
|
779 |
SDL_UnRLESurface(surface, 1);
|
slouken@1895
|
780 |
surface->flags |= SDL_RLEACCEL; /* save accel'd state */
|
slouken@1895
|
781 |
}
|
slouken@1895
|
782 |
}
|
slouken@0
|
783 |
|
slouken@1895
|
784 |
/* Increment the surface lock count, for recursive locks */
|
slouken@1895
|
785 |
++surface->locked;
|
slouken@0
|
786 |
|
slouken@1895
|
787 |
/* Ready to go.. */
|
slouken@1895
|
788 |
return (0);
|
slouken@0
|
789 |
}
|
slouken@1895
|
790 |
|
slouken@0
|
791 |
/*
|
slouken@0
|
792 |
* Unlock a previously locked surface
|
slouken@0
|
793 |
*/
|
slouken@1895
|
794 |
void
|
slouken@1895
|
795 |
SDL_UnlockSurface(SDL_Surface * surface)
|
slouken@0
|
796 |
{
|
slouken@1895
|
797 |
/* Only perform an unlock if we are locked */
|
slouken@1895
|
798 |
if (!surface->locked || (--surface->locked > 0)) {
|
slouken@1895
|
799 |
return;
|
slouken@1895
|
800 |
}
|
slouken@0
|
801 |
|
slouken@1895
|
802 |
/* Update RLE encoded surface with new data */
|
slouken@1895
|
803 |
if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) {
|
slouken@1895
|
804 |
surface->flags &= ~SDL_RLEACCEL; /* stop lying */
|
slouken@1895
|
805 |
SDL_RLESurface(surface);
|
slouken@1895
|
806 |
}
|
slouken@0
|
807 |
}
|
slouken@0
|
808 |
|
slouken@7191
|
809 |
/*
|
slouken@0
|
810 |
* Convert a surface into the specified pixel format.
|
slouken@0
|
811 |
*/
|
slouken@1895
|
812 |
SDL_Surface *
|
icculus@7725
|
813 |
SDL_ConvertSurface(SDL_Surface * surface, const SDL_PixelFormat * format,
|
slouken@2807
|
814 |
Uint32 flags)
|
slouken@0
|
815 |
{
|
slouken@1895
|
816 |
SDL_Surface *convert;
|
slouken@2266
|
817 |
Uint32 copy_flags;
|
slouken@7601
|
818 |
SDL_Color copy_color;
|
slouken@1895
|
819 |
SDL_Rect bounds;
|
slouken@0
|
820 |
|
slouken@1895
|
821 |
/* Check for empty destination palette! (results in empty image) */
|
slouken@1895
|
822 |
if (format->palette != NULL) {
|
slouken@1895
|
823 |
int i;
|
slouken@1895
|
824 |
for (i = 0; i < format->palette->ncolors; ++i) {
|
slouken@1895
|
825 |
if ((format->palette->colors[i].r != 0xFF) ||
|
slouken@1895
|
826 |
(format->palette->colors[i].g != 0xFF) ||
|
slouken@1895
|
827 |
(format->palette->colors[i].b != 0xFF))
|
slouken@1895
|
828 |
break;
|
slouken@1895
|
829 |
}
|
slouken@1895
|
830 |
if (i == format->palette->ncolors) {
|
slouken@1895
|
831 |
SDL_SetError("Empty destination palette");
|
slouken@1895
|
832 |
return (NULL);
|
slouken@1895
|
833 |
}
|
slouken@1895
|
834 |
}
|
slouken@264
|
835 |
|
slouken@1895
|
836 |
/* Create a new surface with the desired format */
|
slouken@2807
|
837 |
convert = SDL_CreateRGBSurface(flags, surface->w, surface->h,
|
slouken@1895
|
838 |
format->BitsPerPixel, format->Rmask,
|
slouken@1895
|
839 |
format->Gmask, format->Bmask,
|
slouken@1895
|
840 |
format->Amask);
|
slouken@1895
|
841 |
if (convert == NULL) {
|
slouken@1895
|
842 |
return (NULL);
|
slouken@1895
|
843 |
}
|
slouken@0
|
844 |
|
slouken@1895
|
845 |
/* Copy the palette if any */
|
slouken@1895
|
846 |
if (format->palette && convert->format->palette) {
|
slouken@1895
|
847 |
SDL_memcpy(convert->format->palette->colors,
|
slouken@1895
|
848 |
format->palette->colors,
|
slouken@1895
|
849 |
format->palette->ncolors * sizeof(SDL_Color));
|
slouken@1895
|
850 |
convert->format->palette->ncolors = format->palette->ncolors;
|
slouken@1895
|
851 |
}
|
slouken@0
|
852 |
|
slouken@2266
|
853 |
/* Save the original copy flags */
|
slouken@2266
|
854 |
copy_flags = surface->map->info.flags;
|
slouken@7601
|
855 |
copy_color.r = surface->map->info.r;
|
slouken@7601
|
856 |
copy_color.g = surface->map->info.g;
|
slouken@7601
|
857 |
copy_color.b = surface->map->info.b;
|
slouken@7601
|
858 |
copy_color.a = surface->map->info.a;
|
slouken@7601
|
859 |
surface->map->info.r = 0xFF;
|
slouken@7601
|
860 |
surface->map->info.g = 0xFF;
|
slouken@7601
|
861 |
surface->map->info.b = 0xFF;
|
slouken@7601
|
862 |
surface->map->info.a = 0xFF;
|
slouken@2266
|
863 |
surface->map->info.flags = 0;
|
slouken@7601
|
864 |
SDL_InvalidateMap(surface->map);
|
slouken@0
|
865 |
|
slouken@1895
|
866 |
/* Copy over the image data */
|
slouken@1895
|
867 |
bounds.x = 0;
|
slouken@1895
|
868 |
bounds.y = 0;
|
slouken@1895
|
869 |
bounds.w = surface->w;
|
slouken@1895
|
870 |
bounds.h = surface->h;
|
slouken@1895
|
871 |
SDL_LowerBlit(surface, &bounds, convert, &bounds);
|
slouken@0
|
872 |
|
slouken@1895
|
873 |
/* Clean up the original surface, and update converted surface */
|
slouken@7601
|
874 |
convert->map->info.r = copy_color.r;
|
slouken@7601
|
875 |
convert->map->info.g = copy_color.g;
|
slouken@7601
|
876 |
convert->map->info.b = copy_color.b;
|
slouken@7601
|
877 |
convert->map->info.a = copy_color.a;
|
slouken@2824
|
878 |
convert->map->info.flags =
|
slouken@2824
|
879 |
(copy_flags &
|
slouken@2824
|
880 |
~(SDL_COPY_COLORKEY | SDL_COPY_BLEND
|
slouken@2824
|
881 |
| SDL_COPY_RLE_DESIRED | SDL_COPY_RLE_COLORKEY |
|
slouken@2824
|
882 |
SDL_COPY_RLE_ALPHAKEY));
|
slouken@7601
|
883 |
surface->map->info.r = copy_color.r;
|
slouken@7601
|
884 |
surface->map->info.g = copy_color.g;
|
slouken@7601
|
885 |
surface->map->info.b = copy_color.b;
|
slouken@7601
|
886 |
surface->map->info.a = copy_color.a;
|
slouken@2824
|
887 |
surface->map->info.flags = copy_flags;
|
slouken@7601
|
888 |
SDL_InvalidateMap(surface->map);
|
slouken@2266
|
889 |
if (copy_flags & SDL_COPY_COLORKEY) {
|
slouken@7023
|
890 |
SDL_bool set_colorkey_by_color = SDL_FALSE;
|
slouken@0
|
891 |
|
slouken@7023
|
892 |
if (surface->format->palette) {
|
slouken@7191
|
893 |
if (format->palette &&
|
slouken@7023
|
894 |
surface->format->palette->ncolors <= format->palette->ncolors &&
|
slouken@7023
|
895 |
(SDL_memcmp(surface->format->palette->colors, format->palette->colors,
|
slouken@7023
|
896 |
surface->format->palette->ncolors * sizeof(SDL_Color)) == 0)) {
|
slouken@7023
|
897 |
/* The palette is identical, just set the same colorkey */
|
slouken@7023
|
898 |
SDL_SetColorKey(convert, 1, surface->map->info.colorkey);
|
slouken@7023
|
899 |
} else if (format->Amask) {
|
slouken@7023
|
900 |
/* The alpha was set in the destination from the palette */
|
slouken@7023
|
901 |
} else {
|
slouken@7023
|
902 |
set_colorkey_by_color = SDL_TRUE;
|
slouken@7023
|
903 |
}
|
slouken@7023
|
904 |
} else {
|
slouken@7023
|
905 |
set_colorkey_by_color = SDL_TRUE;
|
slouken@7023
|
906 |
}
|
slouken@7023
|
907 |
|
slouken@7023
|
908 |
if (set_colorkey_by_color) {
|
slouken@7023
|
909 |
/* Set the colorkey by color, which needs to be unique */
|
slouken@7023
|
910 |
Uint8 keyR, keyG, keyB, keyA;
|
slouken@7023
|
911 |
|
slouken@7023
|
912 |
SDL_GetRGBA(surface->map->info.colorkey, surface->format, &keyR,
|
slouken@7023
|
913 |
&keyG, &keyB, &keyA);
|
slouken@7023
|
914 |
SDL_SetColorKey(convert, 1,
|
slouken@7023
|
915 |
SDL_MapRGBA(convert->format, keyR, keyG, keyB, keyA));
|
slouken@7023
|
916 |
/* This is needed when converting for 3D texture upload */
|
slouken@7023
|
917 |
SDL_ConvertColorkeyToAlpha(convert);
|
slouken@7023
|
918 |
}
|
slouken@1895
|
919 |
}
|
slouken@2824
|
920 |
SDL_SetClipRect(convert, &surface->clip_rect);
|
slouken@2266
|
921 |
|
slouken@2266
|
922 |
/* Enable alpha blending by default if the new surface has an
|
slouken@2266
|
923 |
* alpha channel or alpha modulation */
|
slouken@2824
|
924 |
if ((surface->format->Amask && format->Amask) ||
|
slouken@4491
|
925 |
(copy_flags & (SDL_COPY_COLORKEY|SDL_COPY_MODULATE_ALPHA))) {
|
slouken@2884
|
926 |
SDL_SetSurfaceBlendMode(convert, SDL_BLENDMODE_BLEND);
|
slouken@1895
|
927 |
}
|
slouken@2824
|
928 |
if ((copy_flags & SDL_COPY_RLE_DESIRED) || (flags & SDL_RLEACCEL)) {
|
slouken@2824
|
929 |
SDL_SetSurfaceRLE(convert, SDL_RLEACCEL);
|
slouken@2824
|
930 |
}
|
slouken@0
|
931 |
|
slouken@1895
|
932 |
/* We're ready to go! */
|
slouken@1895
|
933 |
return (convert);
|
slouken@0
|
934 |
}
|
slouken@0
|
935 |
|
slouken@5375
|
936 |
SDL_Surface *
|
slouken@5375
|
937 |
SDL_ConvertSurfaceFormat(SDL_Surface * surface, Uint32 pixel_format,
|
slouken@5375
|
938 |
Uint32 flags)
|
slouken@5375
|
939 |
{
|
slouken@5375
|
940 |
SDL_PixelFormat *fmt;
|
slouken@5515
|
941 |
SDL_Surface *convert = NULL;
|
slouken@5375
|
942 |
|
slouken@5375
|
943 |
fmt = SDL_AllocFormat(pixel_format);
|
slouken@5375
|
944 |
if (fmt) {
|
slouken@5375
|
945 |
convert = SDL_ConvertSurface(surface, fmt, flags);
|
slouken@5375
|
946 |
SDL_FreeFormat(fmt);
|
slouken@5375
|
947 |
}
|
slouken@5375
|
948 |
return convert;
|
slouken@5375
|
949 |
}
|
slouken@5375
|
950 |
|
slouken@0
|
951 |
/*
|
slouken@3434
|
952 |
* Create a surface on the stack for quick blit operations
|
slouken@3434
|
953 |
*/
|
slouken@3434
|
954 |
static __inline__ SDL_bool
|
slouken@3434
|
955 |
SDL_CreateSurfaceOnStack(int width, int height, Uint32 pixel_format,
|
slouken@7191
|
956 |
void * pixels, int pitch, SDL_Surface * surface,
|
slouken@3434
|
957 |
SDL_PixelFormat * format, SDL_BlitMap * blitmap)
|
slouken@3434
|
958 |
{
|
slouken@5288
|
959 |
if (SDL_ISPIXELFORMAT_INDEXED(pixel_format)) {
|
slouken@5288
|
960 |
SDL_SetError("Indexed pixel formats not supported");
|
slouken@3434
|
961 |
return SDL_FALSE;
|
slouken@3434
|
962 |
}
|
slouken@5288
|
963 |
if (SDL_InitFormat(format, pixel_format) < 0) {
|
slouken@3434
|
964 |
return SDL_FALSE;
|
slouken@3434
|
965 |
}
|
slouken@3434
|
966 |
|
slouken@3434
|
967 |
SDL_zerop(surface);
|
slouken@3434
|
968 |
surface->flags = SDL_PREALLOC;
|
slouken@5288
|
969 |
surface->format = format;
|
slouken@3434
|
970 |
surface->pixels = pixels;
|
slouken@3434
|
971 |
surface->w = width;
|
slouken@3434
|
972 |
surface->h = height;
|
slouken@3434
|
973 |
surface->pitch = pitch;
|
slouken@3434
|
974 |
/* We don't actually need to set up the clip rect for our purposes */
|
gabomdq@7678
|
975 |
/* SDL_SetClipRect(surface, NULL); */
|
slouken@3434
|
976 |
|
slouken@3434
|
977 |
/* Allocate an empty mapping */
|
slouken@3434
|
978 |
SDL_zerop(blitmap);
|
slouken@3434
|
979 |
blitmap->info.r = 0xFF;
|
slouken@3434
|
980 |
blitmap->info.g = 0xFF;
|
slouken@3434
|
981 |
blitmap->info.b = 0xFF;
|
slouken@3434
|
982 |
blitmap->info.a = 0xFF;
|
slouken@3434
|
983 |
surface->map = blitmap;
|
slouken@3434
|
984 |
|
slouken@3434
|
985 |
/* The surface is ready to go */
|
slouken@3434
|
986 |
surface->refcount = 1;
|
slouken@3434
|
987 |
return SDL_TRUE;
|
slouken@3434
|
988 |
}
|
slouken@3434
|
989 |
|
slouken@3434
|
990 |
/*
|
slouken@3434
|
991 |
* Copy a block of pixels of one format to another format
|
slouken@3434
|
992 |
*/
|
slouken@3434
|
993 |
int SDL_ConvertPixels(int width, int height,
|
slouken@3434
|
994 |
Uint32 src_format, const void * src, int src_pitch,
|
slouken@3434
|
995 |
Uint32 dst_format, void * dst, int dst_pitch)
|
slouken@3434
|
996 |
{
|
slouken@3434
|
997 |
SDL_Surface src_surface, dst_surface;
|
slouken@3434
|
998 |
SDL_PixelFormat src_fmt, dst_fmt;
|
slouken@3434
|
999 |
SDL_BlitMap src_blitmap, dst_blitmap;
|
slouken@3434
|
1000 |
SDL_Rect rect;
|
icculus@6407
|
1001 |
void *nonconst_src = (void *) src;
|
slouken@3434
|
1002 |
|
slouken@6920
|
1003 |
/* Check to make sure we are bliting somewhere, so we don't crash */
|
slouken@6920
|
1004 |
if (!dst) {
|
icculus@7037
|
1005 |
return SDL_InvalidParamError("dst");
|
slouken@6920
|
1006 |
}
|
slouken@6920
|
1007 |
if (!dst_pitch) {
|
icculus@7037
|
1008 |
return SDL_InvalidParamError("dst_pitch");
|
slouken@6920
|
1009 |
}
|
slouken@6920
|
1010 |
|
slouken@3434
|
1011 |
/* Fast path for same format copy */
|
slouken@3434
|
1012 |
if (src_format == dst_format) {
|
slouken@3434
|
1013 |
int bpp;
|
slouken@3434
|
1014 |
|
slouken@3434
|
1015 |
if (SDL_ISPIXELFORMAT_FOURCC(src_format)) {
|
slouken@3434
|
1016 |
switch (src_format) {
|
slouken@3434
|
1017 |
case SDL_PIXELFORMAT_YV12:
|
slouken@3434
|
1018 |
case SDL_PIXELFORMAT_IYUV:
|
slouken@3434
|
1019 |
case SDL_PIXELFORMAT_YUY2:
|
slouken@3434
|
1020 |
case SDL_PIXELFORMAT_UYVY:
|
slouken@3434
|
1021 |
case SDL_PIXELFORMAT_YVYU:
|
slouken@3434
|
1022 |
bpp = 2;
|
slouken@6663
|
1023 |
break;
|
slouken@3434
|
1024 |
default:
|
icculus@7037
|
1025 |
return SDL_SetError("Unknown FOURCC pixel format");
|
slouken@3434
|
1026 |
}
|
slouken@3434
|
1027 |
} else {
|
slouken@3434
|
1028 |
bpp = SDL_BYTESPERPIXEL(src_format);
|
slouken@3434
|
1029 |
}
|
slouken@3434
|
1030 |
width *= bpp;
|
slouken@3434
|
1031 |
|
slouken@3434
|
1032 |
while (height-- > 0) {
|
slouken@3434
|
1033 |
SDL_memcpy(dst, src, width);
|
slouken@3434
|
1034 |
src = (Uint8*)src + src_pitch;
|
slouken@3434
|
1035 |
dst = (Uint8*)dst + dst_pitch;
|
slouken@3434
|
1036 |
}
|
slouken@6041
|
1037 |
return 0;
|
slouken@3434
|
1038 |
}
|
slouken@3434
|
1039 |
|
icculus@6407
|
1040 |
if (!SDL_CreateSurfaceOnStack(width, height, src_format, nonconst_src,
|
slouken@3434
|
1041 |
src_pitch,
|
slouken@3434
|
1042 |
&src_surface, &src_fmt, &src_blitmap)) {
|
slouken@3434
|
1043 |
return -1;
|
slouken@3434
|
1044 |
}
|
slouken@3434
|
1045 |
if (!SDL_CreateSurfaceOnStack(width, height, dst_format, dst, dst_pitch,
|
slouken@3434
|
1046 |
&dst_surface, &dst_fmt, &dst_blitmap)) {
|
slouken@3434
|
1047 |
return -1;
|
slouken@3434
|
1048 |
}
|
slouken@3434
|
1049 |
|
slouken@3434
|
1050 |
/* Set up the rect and go! */
|
slouken@3434
|
1051 |
rect.x = 0;
|
slouken@3434
|
1052 |
rect.y = 0;
|
slouken@3434
|
1053 |
rect.w = width;
|
slouken@3436
|
1054 |
rect.h = height;
|
slouken@3434
|
1055 |
return SDL_LowerBlit(&src_surface, &rect, &dst_surface, &rect);
|
slouken@3434
|
1056 |
}
|
slouken@3434
|
1057 |
|
slouken@3434
|
1058 |
/*
|
slouken@0
|
1059 |
* Free a surface created by the above function.
|
slouken@0
|
1060 |
*/
|
slouken@1895
|
1061 |
void
|
slouken@1895
|
1062 |
SDL_FreeSurface(SDL_Surface * surface)
|
slouken@0
|
1063 |
{
|
slouken@1895
|
1064 |
if (surface == NULL) {
|
slouken@1895
|
1065 |
return;
|
slouken@1895
|
1066 |
}
|
slouken@5288
|
1067 |
if (surface->flags & SDL_DONTFREE) {
|
slouken@5288
|
1068 |
return;
|
slouken@5288
|
1069 |
}
|
slouken@1895
|
1070 |
if (--surface->refcount > 0) {
|
slouken@1895
|
1071 |
return;
|
slouken@1895
|
1072 |
}
|
slouken@1895
|
1073 |
while (surface->locked > 0) {
|
slouken@1895
|
1074 |
SDL_UnlockSurface(surface);
|
slouken@1895
|
1075 |
}
|
slouken@1895
|
1076 |
if (surface->flags & SDL_RLEACCEL) {
|
slouken@1895
|
1077 |
SDL_UnRLESurface(surface, 0);
|
slouken@1895
|
1078 |
}
|
slouken@1895
|
1079 |
if (surface->format) {
|
slouken@1895
|
1080 |
SDL_SetSurfacePalette(surface, NULL);
|
slouken@1895
|
1081 |
SDL_FreeFormat(surface->format);
|
slouken@1895
|
1082 |
surface->format = NULL;
|
slouken@1895
|
1083 |
}
|
slouken@1895
|
1084 |
if (surface->map != NULL) {
|
slouken@1895
|
1085 |
SDL_FreeBlitMap(surface->map);
|
slouken@1895
|
1086 |
surface->map = NULL;
|
slouken@1895
|
1087 |
}
|
slouken@7719
|
1088 |
if (!(surface->flags & SDL_PREALLOC)) {
|
slouken@1895
|
1089 |
SDL_free(surface->pixels);
|
slouken@1895
|
1090 |
}
|
slouken@1895
|
1091 |
SDL_free(surface);
|
slouken@0
|
1092 |
}
|
slouken@1895
|
1093 |
|
slouken@1895
|
1094 |
/* vi: set ts=4 sw=4 expandtab: */
|