src/mesa/drivers/dri/intel/intel_tex_format.c

   1 #include "intel_context.h"
   2 #include "intel_tex.h"
   3 #include "main/texformat.h"
   4 #include "main/enums.h"
   5
   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);
  20
  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;
  37
  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;
  45
  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;
  51
  52    case GL_RGBA4:
  53    case GL_RGBA2:
  54       return &_mesa_texformat_argb4444;
  55
  56    case GL_RGB5_A1:
  57       return &_mesa_texformat_argb1555;
  58
  59    case GL_RGB8:
  60    case GL_RGB10:
  61    case GL_RGB12:
  62    case GL_RGB16:
  63       return &_mesa_texformat_argb8888;
  64
  65    case GL_RGB5:
  66    case GL_RGB4:
  67    case GL_R3_G3_B2:
  68       return &_mesa_texformat_rgb565;
  69
  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;
  77
  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;
  86
  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;
  97
  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_s8_z24;
 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 }