git.osdn.net Git - android-x86/external-mesa.git/blob - src/mesa/drivers/dri/intel/intel_tex

1 #include "intel_context.h"

2 #include "intel_tex.h"

3 #include "texformat.h"

4 #include "enums.h"

6 /* It works out that this function is fine for all the supported

7 * hardware. However, there is still a need to map the formats onto

8 * hardware descriptors.

9 */

10 /* Note that the i915 can actually support many more formats than

11 * these if we take the step of simply swizzling the colors

12 * immediately after sampling...

13 */

14 const struct gl_texture_format *

15 intelChooseTextureFormat(GLcontext * ctx, GLint internalFormat,

16 GLenum format, GLenum type)

17 {

18 struct intel_context *intel = intel_context(ctx);

19 const GLboolean do32bpt = (intel->ctx.Visual.rgbBits == 32);

21 switch (internalFormat) {

22 case 4:

23 case GL_RGBA:

24 case GL_COMPRESSED_RGBA:

25 if (format == GL_BGRA) {

26 if (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) {

27 return &_mesa_texformat_argb8888;

28 }

29 else if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {

30 return &_mesa_texformat_argb4444;

31 }

32 else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {

33 return &_mesa_texformat_argb1555;

34 }

35 }

36 return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_argb4444;

38 case 3:

39 case GL_RGB:

40 case GL_COMPRESSED_RGB:

41 if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) {

42 return &_mesa_texformat_rgb565;

43 }

44 return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_rgb565;

46 case GL_RGBA8:

47 case GL_RGB10_A2:

48 case GL_RGBA12:

49 case GL_RGBA16:

50 return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_argb4444;

52 case GL_RGBA4:

53 case GL_RGBA2:

54 return &_mesa_texformat_argb4444;

56 case GL_RGB5_A1:

57 return &_mesa_texformat_argb1555;

59 case GL_RGB8:

60 case GL_RGB10:

61 case GL_RGB12:

62 case GL_RGB16:

63 return &_mesa_texformat_argb8888;

65 case GL_RGB5:

66 case GL_RGB4:

67 case GL_R3_G3_B2:

68 return &_mesa_texformat_rgb565;

70 case GL_ALPHA:

71 case GL_ALPHA4:

72 case GL_ALPHA8:

73 case GL_ALPHA12:

74 case GL_ALPHA16:

75 case GL_COMPRESSED_ALPHA:

76 return &_mesa_texformat_a8;

78 case 1:

79 case GL_LUMINANCE:

80 case GL_LUMINANCE4:

81 case GL_LUMINANCE8:

82 case GL_LUMINANCE12:

83 case GL_LUMINANCE16:

84 case GL_COMPRESSED_LUMINANCE:

85 return &_mesa_texformat_l8;

87 case 2:

88 case GL_LUMINANCE_ALPHA:

89 case GL_LUMINANCE4_ALPHA4:

90 case GL_LUMINANCE6_ALPHA2:

91 case GL_LUMINANCE8_ALPHA8:

92 case GL_LUMINANCE12_ALPHA4:

93 case GL_LUMINANCE12_ALPHA12:

94 case GL_LUMINANCE16_ALPHA16:

95 case GL_COMPRESSED_LUMINANCE_ALPHA:

96 return &_mesa_texformat_al88;

98 case GL_INTENSITY:

99 case GL_INTENSITY4:

100 case GL_INTENSITY8:

101 case GL_INTENSITY12:

102 case GL_INTENSITY16:

103 case GL_COMPRESSED_INTENSITY:

104 return &_mesa_texformat_i8;

105

106 case GL_YCBCR_MESA:

107 if (type == GL_UNSIGNED_SHORT_8_8_MESA || type == GL_UNSIGNED_BYTE)

108 return &_mesa_texformat_ycbcr;

109 else

110 return &_mesa_texformat_ycbcr_rev;

111

112 case GL_COMPRESSED_RGB_FXT1_3DFX:

113 return &_mesa_texformat_rgb_fxt1;

114 case GL_COMPRESSED_RGBA_FXT1_3DFX:

115 return &_mesa_texformat_rgba_fxt1;

116

117 case GL_RGB_S3TC:

118 case GL_RGB4_S3TC:

119 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:

120 return &_mesa_texformat_rgb_dxt1;

121

122 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:

123 return &_mesa_texformat_rgba_dxt1;

124

125 case GL_RGBA_S3TC:

126 case GL_RGBA4_S3TC:

127 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:

128 return &_mesa_texformat_rgba_dxt3;

129

130 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:

131 return &_mesa_texformat_rgba_dxt5;

132

133 case GL_DEPTH_COMPONENT:

134 case GL_DEPTH_COMPONENT16:

135 case GL_DEPTH_COMPONENT24:

136 case GL_DEPTH_COMPONENT32:

137 return &_mesa_texformat_z16;

138

139 case GL_DEPTH_STENCIL_EXT:

140 case GL_DEPTH24_STENCIL8_EXT:

141 return &_mesa_texformat_z24_s8;

142

143 #ifndef I915

144 case GL_SRGB_EXT:

145 case GL_SRGB8_EXT:

146 case GL_SRGB_ALPHA_EXT:

147 case GL_SRGB8_ALPHA8_EXT:

148 case GL_SLUMINANCE_EXT:

149 case GL_SLUMINANCE8_EXT:

150 case GL_SLUMINANCE_ALPHA_EXT:

151 case GL_SLUMINANCE8_ALPHA8_EXT:

152 case GL_COMPRESSED_SRGB_EXT:

153 case GL_COMPRESSED_SRGB_ALPHA_EXT:

154 case GL_COMPRESSED_SLUMINANCE_EXT:

155 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:

156 return &_mesa_texformat_srgba8;

157 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:

158 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:

159 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:

160 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:

161 return &_mesa_texformat_srgb_dxt1;

162 #endif

163

164 default:

165 fprintf(stderr, "unexpected texture format %s in %s\n",

166 _mesa_lookup_enum_by_nr(internalFormat), __FUNCTION__);

167 return NULL;

168 }

169

170 return NULL; /* never get here */

171 }

172

173 int intel_compressed_num_bytes(GLuint mesaFormat)

174 {

175 int bytes = 0;

176 switch(mesaFormat) {

177

178 case MESA_FORMAT_RGB_FXT1:

179 case MESA_FORMAT_RGBA_FXT1:

180 case MESA_FORMAT_RGB_DXT1:

181 case MESA_FORMAT_RGBA_DXT1:

182 bytes = 2;

183 break;

184

185 case MESA_FORMAT_RGBA_DXT3:

186 case MESA_FORMAT_RGBA_DXT5:

187 bytes = 4;

188 default:

189 break;

190 }

191

192 return bytes;

193 }