Mercurial > sdl-ios-xcode
annotate src/video/SDL_blendline.c @ 3099:82e60908fab1
Date: Mon, 23 Mar 2009 09:17:24 +0200
From: "Mike Gorchak"
Subject: New QNX patches
Please apply patch qnx4.diff, which is attached. What has been done:
1)Added back OpenGL ES renderer for QNX target. Added few corrections to
OpenGL ES renderer to let it work under QNX. OpenGL ES renderer do not
support textures under QNX, so I think some additional work must be done.
2) Added GL_OES_query_matrix extension to SDL_opengles.h header file, which
required by OpenGL ES 1.1 specification.
3) Added attribute clearing at the entrance of function
SDL_GL_GetAttribure(). Added error checking into the function
SDL_GL_GetAttribure(), because some attributes can't be obtained in OpenGL
ES 1.0.
4) Porting testdyngles to OpenGL ES 1.0 (1.1 has glColor4ub() and
glColor4f() functions, but 1.0 has glColor4f() only).
5) Added error checking after obtaining attributes using
SDL_GL_GetAttribute() function to the testgl2 and testgles.
6) Small correction to testmultiaudio with printing errors.
7) Added software and accelerated OpenGL ES 1.0 support into the QNX GF
driver.
Please remove ./src/audio/nto directory - it will not be used anymore.
Please create ./src/audio/qsa directory and add content of the archive
qsa.tar.gz into this directory. I rewrote some sound code, added support for
multiple audio cards, enumeration, etc. Added initial support for capture.
As far as I can understand SDL 1.3 is not supporting audio capture right now
? Sam, Am I right ? Or audio capture must be supported through the
PlayDevice routine ?
And last, please put file SDL_gf_opengles.c to the ./src/video/qnxgf
directory. It is OpenGL ES 1.1 emulation layer for some functions, which are
not supported by OpenGL ES 1.0.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 24 Mar 2009 10:33:12 +0000 |
parents | 27d8b12e0e8e |
children | 0267b8b1595c |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2009 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
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24 #include "SDL_draw.h" |
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25 |
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26 static int |
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27 SDL_BlendLine_RGB555(SDL_Surface * dst, int x1, int y1, int x2, int y2, |
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28 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) |
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29 { |
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30 unsigned inva = 0xff - a; |
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31 |
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32 switch (blendMode) { |
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33 case SDL_BLENDMODE_BLEND: |
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34 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_BLEND_RGB555); |
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35 break; |
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36 case SDL_BLENDMODE_ADD: |
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37 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_ADD_RGB555); |
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38 break; |
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39 case SDL_BLENDMODE_MOD: |
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40 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_MOD_RGB555); |
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41 break; |
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42 default: |
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43 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_RGB555); |
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44 break; |
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45 } |
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46 return 0; |
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47 } |
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48 |
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49 static int |
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50 SDL_BlendLine_RGB565(SDL_Surface * dst, int x1, int y1, int x2, int y2, |
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51 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) |
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52 { |
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53 unsigned inva = 0xff - a; |
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54 |
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55 switch (blendMode) { |
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56 case SDL_BLENDMODE_BLEND: |
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57 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_BLEND_RGB565); |
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58 break; |
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59 case SDL_BLENDMODE_ADD: |
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60 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_ADD_RGB565); |
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61 break; |
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62 case SDL_BLENDMODE_MOD: |
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63 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_MOD_RGB565); |
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64 break; |
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65 default: |
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66 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_RGB565); |
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67 break; |
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68 } |
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69 return 0; |
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70 } |
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71 |
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72 static int |
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73 SDL_BlendLine_RGB888(SDL_Surface * dst, int x1, int y1, int x2, int y2, |
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74 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) |
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75 { |
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76 unsigned inva = 0xff - a; |
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77 |
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78 switch (blendMode) { |
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79 case SDL_BLENDMODE_BLEND: |
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80 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_BLEND_RGB888); |
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81 break; |
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82 case SDL_BLENDMODE_ADD: |
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83 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_ADD_RGB888); |
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84 break; |
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85 case SDL_BLENDMODE_MOD: |
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86 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_MOD_RGB888); |
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87 break; |
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88 default: |
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89 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_RGB888); |
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90 break; |
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91 } |
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92 return 0; |
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93 } |
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94 |
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95 static int |
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96 SDL_BlendLine_ARGB8888(SDL_Surface * dst, int x1, int y1, int x2, int y2, |
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97 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) |
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98 { |
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99 unsigned inva = 0xff - a; |
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100 |
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101 switch (blendMode) { |
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102 case SDL_BLENDMODE_BLEND: |
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103 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_BLEND_ARGB8888); |
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104 break; |
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105 case SDL_BLENDMODE_ADD: |
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106 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_ADD_ARGB8888); |
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107 break; |
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108 case SDL_BLENDMODE_MOD: |
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109 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_MOD_ARGB8888); |
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110 break; |
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111 default: |
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112 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY_ARGB8888); |
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113 break; |
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114 } |
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115 return 0; |
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116 } |
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117 |
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118 static int |
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119 SDL_BlendLine_RGB(SDL_Surface * dst, int x1, int y1, int x2, int y2, |
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120 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) |
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121 { |
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122 SDL_PixelFormat *fmt = dst->format; |
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123 unsigned inva = 0xff - a; |
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124 |
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125 switch (fmt->BytesPerPixel) { |
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126 case 2: |
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127 switch (blendMode) { |
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128 case SDL_BLENDMODE_BLEND: |
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129 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY2_BLEND_RGB); |
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130 break; |
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131 case SDL_BLENDMODE_ADD: |
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132 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY2_ADD_RGB); |
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133 break; |
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134 case SDL_BLENDMODE_MOD: |
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135 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY2_MOD_RGB); |
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136 break; |
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137 default: |
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138 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY2_RGB); |
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139 break; |
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140 } |
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141 return 0; |
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142 case 4: |
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143 switch (blendMode) { |
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144 case SDL_BLENDMODE_BLEND: |
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145 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY4_BLEND_RGB); |
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146 break; |
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147 case SDL_BLENDMODE_ADD: |
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148 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY4_ADD_RGB); |
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149 break; |
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150 case SDL_BLENDMODE_MOD: |
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151 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY4_MOD_RGB); |
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152 break; |
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153 default: |
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154 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY4_RGB); |
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155 break; |
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156 } |
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157 return 0; |
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158 default: |
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159 SDL_Unsupported(); |
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160 return -1; |
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161 } |
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162 } |
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163 |
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164 static int |
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165 SDL_BlendLine_RGBA(SDL_Surface * dst, int x1, int y1, int x2, int y2, |
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166 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) |
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167 { |
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168 SDL_PixelFormat *fmt = dst->format; |
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169 unsigned inva = 0xff - a; |
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170 |
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171 switch (fmt->BytesPerPixel) { |
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172 case 4: |
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173 switch (blendMode) { |
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174 case SDL_BLENDMODE_BLEND: |
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175 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY4_BLEND_RGBA); |
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176 break; |
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177 case SDL_BLENDMODE_ADD: |
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178 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY4_ADD_RGBA); |
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179 break; |
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180 case SDL_BLENDMODE_MOD: |
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181 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY4_MOD_RGBA); |
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182 break; |
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183 default: |
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184 DRAWLINE(x1, y1, x2, y2, DRAW_SETPIXELXY4_RGBA); |
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185 break; |
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186 } |
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187 return 0; |
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188 default: |
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189 SDL_Unsupported(); |
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190 return -1; |
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191 } |
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192 } |
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193 |
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194 int |
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195 SDL_BlendLine(SDL_Surface * dst, int x1, int y1, int x2, int y2, |
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196 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) |
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197 { |
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198 SDL_PixelFormat *fmt = dst->format; |
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199 |
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200 /* This function doesn't work on surfaces < 8 bpp */ |
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201 if (dst->format->BitsPerPixel < 8) { |
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202 SDL_SetError("SDL_BlendLine(): Unsupported surface format"); |
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203 return (-1); |
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204 } |
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205 |
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206 /* Perform clipping */ |
2910
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Fixed argument order to the line clipping routine
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|
207 if (!SDL_IntersectRectAndLine(&dst->clip_rect, &x1, &y1, &x2, &y2)) { |
2909 | 208 return (0); |
209 } | |
210 | |
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211 |
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212 if ((blendMode == SDL_BLENDMODE_BLEND) |
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213 || (blendMode == SDL_BLENDMODE_ADD)) { |
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214 r = DRAW_MUL(r, a); |
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215 g = DRAW_MUL(g, a); |
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216 b = DRAW_MUL(b, a); |
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217 } |
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218 |
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219 switch (fmt->BitsPerPixel) { |
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220 case 15: |
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221 switch (fmt->Rmask) { |
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222 case 0x7C00: |
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223 return SDL_BlendLine_RGB555(dst, x1, y1, x2, y2, blendMode, r, g, |
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224 b, a); |
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225 } |
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226 break; |
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227 case 16: |
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228 switch (fmt->Rmask) { |
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229 case 0xF800: |
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230 return SDL_BlendLine_RGB565(dst, x1, y1, x2, y2, blendMode, r, g, |
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231 b, a); |
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232 } |
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233 break; |
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234 case 32: |
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235 switch (fmt->Rmask) { |
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236 case 0x00FF0000: |
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237 if (!fmt->Amask) { |
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238 return SDL_BlendLine_RGB888(dst, x1, y1, x2, y2, blendMode, r, |
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239 g, b, a); |
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240 } else { |
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241 return SDL_BlendLine_ARGB8888(dst, x1, y1, x2, y2, blendMode, |
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242 r, g, b, a); |
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243 } |
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244 break; |
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245 } |
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246 default: |
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247 break; |
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248 } |
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249 |
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250 if (!fmt->Amask) { |
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251 return SDL_BlendLine_RGB(dst, x1, y1, x2, y2, blendMode, r, g, b, a); |
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252 } else { |
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253 return SDL_BlendLine_RGBA(dst, x1, y1, x2, y2, blendMode, r, g, b, a); |
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254 } |
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255 } |
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256 |
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257 /* vi: set ts=4 sw=4 expandtab: */ |