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

   1 #include "intel_context.h"
   2 #include "intel_tex.h"
   3 #include "main/enums.h"
   4 #include "main/formats.h"
   5
   6 /**
   7  * Choose hardware texture format given the user's glTexImage parameters.
   8  *
   9  * It works out that this function is fine for all the supported
  10  * hardware.  However, there is still a need to map the formats onto
  11  * hardware descriptors.
  12  *
  13  * Note that the i915 can actually support many more formats than
  14  * these if we take the step of simply swizzling the colors
  15  * immediately after sampling...
  16  */
  17 gl_format
  18 intelChooseTextureFormat(GLcontext * ctx, GLint internalFormat,
  19                          GLenum format, GLenum type)
  20 {
  21    struct intel_context *intel = intel_context(ctx);
  22    const GLboolean do32bpt = (intel->ctx.Visual.rgbBits >= 24);
  23
  24 #if 0
  25    printf("%s intFmt=0x%x format=0x%x type=0x%x\n",
  26           __FUNCTION__, internalFormat, format, type);
  27 #endif
  28
  29    switch (internalFormat) {
  30    case 4:
  31    case GL_RGBA:
  32    case GL_COMPRESSED_RGBA:
  33       if (format == GL_BGRA) {
  34          if (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) {
  35             return MESA_FORMAT_ARGB8888;
  36          }
  37          else if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
  38             return MESA_FORMAT_ARGB4444;
  39          }
  40          else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
  41             return MESA_FORMAT_ARGB1555;
  42          }
  43       }
  44       return do32bpt ? MESA_FORMAT_ARGB8888 : MESA_FORMAT_ARGB4444;
  45
  46    case 3:
  47    case GL_RGB:
  48    case GL_COMPRESSED_RGB:
  49       if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) {
  50          return MESA_FORMAT_RGB565;
  51       }
  52       if (do32bpt) {
  53          if (intel->has_xrgb_textures)
  54             return MESA_FORMAT_XRGB8888;
  55          else
  56             return MESA_FORMAT_ARGB8888;
  57       } else {
  58          return MESA_FORMAT_RGB565;
  59       }
  60
  61    case GL_RGBA8:
  62    case GL_RGB10_A2:
  63    case GL_RGBA12:
  64    case GL_RGBA16:
  65       return do32bpt ? MESA_FORMAT_ARGB8888 : MESA_FORMAT_ARGB4444;
  66
  67    case GL_RGBA4:
  68    case GL_RGBA2:
  69       return MESA_FORMAT_ARGB4444;
  70
  71    case GL_RGB5_A1:
  72       return MESA_FORMAT_ARGB1555;
  73
  74    case GL_RGB8:
  75    case GL_RGB10:
  76    case GL_RGB12:
  77    case GL_RGB16:
  78       if (intel->has_xrgb_textures)
  79          return MESA_FORMAT_XRGB8888;
  80       else
  81          return MESA_FORMAT_ARGB8888;
  82
  83    case GL_RGB5:
  84    case GL_RGB4:
  85    case GL_R3_G3_B2:
  86       return MESA_FORMAT_RGB565;
  87
  88    case GL_ALPHA:
  89    case GL_ALPHA4:
  90    case GL_ALPHA8:
  91    case GL_ALPHA12:
  92    case GL_ALPHA16:
  93    case GL_COMPRESSED_ALPHA:
  94       return MESA_FORMAT_A8;
  95
  96    case 1:
  97    case GL_LUMINANCE:
  98    case GL_LUMINANCE4:
  99    case GL_LUMINANCE8:
 100    case GL_LUMINANCE12:
 101    case GL_LUMINANCE16:
 102    case GL_COMPRESSED_LUMINANCE:
 103       return MESA_FORMAT_L8;
 104
 105    case GL_LUMINANCE12_ALPHA4:
 106    case GL_LUMINANCE12_ALPHA12:
 107    case GL_LUMINANCE16_ALPHA16:
 108 #ifndef I915
 109       return MESA_FORMAT_AL1616;
 110 #else
 111       /* FALLTHROUGH */
 112 #endif
 113
 114    case 2:
 115    case GL_LUMINANCE_ALPHA:
 116    case GL_LUMINANCE4_ALPHA4:
 117    case GL_LUMINANCE6_ALPHA2:
 118    case GL_LUMINANCE8_ALPHA8:
 119    case GL_COMPRESSED_LUMINANCE_ALPHA:
 120       return MESA_FORMAT_AL88;
 121
 122    case GL_INTENSITY:
 123    case GL_INTENSITY4:
 124    case GL_INTENSITY8:
 125    case GL_INTENSITY12:
 126    case GL_INTENSITY16:
 127    case GL_COMPRESSED_INTENSITY:
 128       return MESA_FORMAT_I8;
 129
 130    case GL_YCBCR_MESA:
 131       if (type == GL_UNSIGNED_SHORT_8_8_MESA || type == GL_UNSIGNED_BYTE)
 132          return MESA_FORMAT_YCBCR;
 133       else
 134          return MESA_FORMAT_YCBCR_REV;
 135
 136    case GL_COMPRESSED_RGB_FXT1_3DFX:
 137       return MESA_FORMAT_RGB_FXT1;
 138    case GL_COMPRESSED_RGBA_FXT1_3DFX:
 139       return MESA_FORMAT_RGBA_FXT1;
 140
 141    case GL_RGB_S3TC:
 142    case GL_RGB4_S3TC:
 143    case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 144       return MESA_FORMAT_RGB_DXT1;
 145
 146    case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 147       return MESA_FORMAT_RGBA_DXT1;
 148
 149    case GL_RGBA_S3TC:
 150    case GL_RGBA4_S3TC:
 151    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 152       return MESA_FORMAT_RGBA_DXT3;
 153
 154    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 155       return MESA_FORMAT_RGBA_DXT5;
 156
 157    case GL_DEPTH_COMPONENT:
 158    case GL_DEPTH_COMPONENT16:
 159    case GL_DEPTH_COMPONENT24:
 160    case GL_DEPTH_COMPONENT32:
 161 #if 0
 162       return MESA_FORMAT_Z16;
 163 #else
 164       /* fall-through.
 165        * 16bpp depth texture can't be paired with a stencil buffer so
 166        * always used combined depth/stencil format.
 167        */
 168 #endif
 169    case GL_DEPTH_STENCIL_EXT:
 170    case GL_DEPTH24_STENCIL8_EXT:
 171       return MESA_FORMAT_S8_Z24;
 172
 173 #ifndef I915
 174    case GL_SRGB_EXT:
 175    case GL_SRGB8_EXT:
 176    case GL_SRGB_ALPHA_EXT:
 177    case GL_SRGB8_ALPHA8_EXT:
 178    case GL_COMPRESSED_SRGB_EXT:
 179    case GL_COMPRESSED_SRGB_ALPHA_EXT:
 180    case GL_COMPRESSED_SLUMINANCE_EXT:
 181    case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
 182       return MESA_FORMAT_SARGB8;
 183    case GL_SLUMINANCE_EXT:
 184    case GL_SLUMINANCE8_EXT:
 185       if (intel->has_luminance_srgb)
 186          return MESA_FORMAT_SL8;
 187       else
 188          return MESA_FORMAT_SARGB8;
 189    case GL_SLUMINANCE_ALPHA_EXT:
 190    case GL_SLUMINANCE8_ALPHA8_EXT:
 191       if (intel->has_luminance_srgb)
 192          return MESA_FORMAT_SLA8;
 193       else
 194          return MESA_FORMAT_SARGB8;
 195    case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
 196    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
 197    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
 198    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
 199       return MESA_FORMAT_SRGB_DXT1;
 200
 201    /* i915 could also do this */
 202    case GL_DUDV_ATI:
 203    case GL_DU8DV8_ATI:
 204       return MESA_FORMAT_DUDV8;
 205    case GL_RGBA_SNORM:
 206    case GL_RGBA8_SNORM:
 207       return MESA_FORMAT_SIGNED_RGBA8888_REV;
 208 #endif
 209
 210    default:
 211       fprintf(stderr, "unexpected texture format %s in %s\n",
 212               _mesa_lookup_enum_by_nr(internalFormat), __FUNCTION__);
 213       return MESA_FORMAT_NONE;
 214    }
 215
 216    return MESA_FORMAT_NONE;       /* never get here */
 217 }
 218
 219 int intel_compressed_num_bytes(GLuint mesaFormat)
 220 {
 221    GLuint bw, bh;
 222    GLuint block_size;
 223
 224    block_size = _mesa_get_format_bytes(mesaFormat);
 225    _mesa_get_format_block_size(mesaFormat, &bw, &bh);
 226
 227    return block_size / bw;
 228 }