1 #include "intel_context.h"
3 #include "main/enums.h"
4 #include "main/formats.h"
7 * Choose hardware texture format given the user's glTexImage parameters.
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.
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...
18 intelChooseTextureFormat(GLcontext
* ctx
, GLint internalFormat
,
19 GLenum format
, GLenum type
)
21 struct intel_context
*intel
= intel_context(ctx
);
24 printf("%s intFmt=0x%x format=0x%x type=0x%x\n",
25 __FUNCTION__
, internalFormat
, format
, type
);
28 switch (internalFormat
) {
31 case GL_COMPRESSED_RGBA
:
32 if (type
== GL_UNSIGNED_SHORT_4_4_4_4_REV
)
33 return MESA_FORMAT_ARGB4444
;
34 else if (type
== GL_UNSIGNED_SHORT_1_5_5_5_REV
)
35 return MESA_FORMAT_ARGB1555
;
37 return MESA_FORMAT_ARGB8888
;
41 case GL_COMPRESSED_RGB
:
42 if (type
== GL_UNSIGNED_SHORT_5_6_5
)
43 return MESA_FORMAT_RGB565
;
44 else if (intel
->has_xrgb_textures
)
45 return MESA_FORMAT_XRGB8888
;
47 return MESA_FORMAT_ARGB8888
;
53 return MESA_FORMAT_ARGB8888
;
57 return MESA_FORMAT_ARGB4444
;
60 return MESA_FORMAT_ARGB1555
;
66 if (intel
->has_xrgb_textures
)
67 return MESA_FORMAT_XRGB8888
;
69 return MESA_FORMAT_ARGB8888
;
74 return MESA_FORMAT_RGB565
;
81 case GL_COMPRESSED_ALPHA
:
82 return MESA_FORMAT_A8
;
90 case GL_COMPRESSED_LUMINANCE
:
91 return MESA_FORMAT_L8
;
93 case GL_LUMINANCE12_ALPHA4
:
94 case GL_LUMINANCE12_ALPHA12
:
95 case GL_LUMINANCE16_ALPHA16
:
97 return MESA_FORMAT_AL1616
;
103 case GL_LUMINANCE_ALPHA
:
104 case GL_LUMINANCE4_ALPHA4
:
105 case GL_LUMINANCE6_ALPHA2
:
106 case GL_LUMINANCE8_ALPHA8
:
107 case GL_COMPRESSED_LUMINANCE_ALPHA
:
108 return MESA_FORMAT_AL88
;
115 case GL_COMPRESSED_INTENSITY
:
116 return MESA_FORMAT_I8
;
119 if (type
== GL_UNSIGNED_SHORT_8_8_MESA
|| type
== GL_UNSIGNED_BYTE
)
120 return MESA_FORMAT_YCBCR
;
122 return MESA_FORMAT_YCBCR_REV
;
124 case GL_COMPRESSED_RGB_FXT1_3DFX
:
125 return MESA_FORMAT_RGB_FXT1
;
126 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
127 return MESA_FORMAT_RGBA_FXT1
;
131 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
132 return MESA_FORMAT_RGB_DXT1
;
134 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
135 return MESA_FORMAT_RGBA_DXT1
;
139 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
140 return MESA_FORMAT_RGBA_DXT3
;
142 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
143 return MESA_FORMAT_RGBA_DXT5
;
145 case GL_DEPTH_COMPONENT
:
146 case GL_DEPTH_COMPONENT16
:
147 case GL_DEPTH_COMPONENT24
:
148 case GL_DEPTH_COMPONENT32
:
150 return MESA_FORMAT_Z16
;
153 * 16bpp depth texture can't be paired with a stencil buffer so
154 * always used combined depth/stencil format.
157 case GL_DEPTH_STENCIL_EXT
:
158 case GL_DEPTH24_STENCIL8_EXT
:
159 return MESA_FORMAT_S8_Z24
;
164 case GL_SRGB_ALPHA_EXT
:
165 case GL_SRGB8_ALPHA8_EXT
:
166 case GL_COMPRESSED_SRGB_EXT
:
167 case GL_COMPRESSED_SRGB_ALPHA_EXT
:
168 case GL_COMPRESSED_SLUMINANCE_EXT
:
169 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT
:
170 return MESA_FORMAT_SARGB8
;
171 case GL_SLUMINANCE_EXT
:
172 case GL_SLUMINANCE8_EXT
:
173 if (intel
->has_luminance_srgb
)
174 return MESA_FORMAT_SL8
;
176 return MESA_FORMAT_SARGB8
;
177 case GL_SLUMINANCE_ALPHA_EXT
:
178 case GL_SLUMINANCE8_ALPHA8_EXT
:
179 if (intel
->has_luminance_srgb
)
180 return MESA_FORMAT_SLA8
;
182 return MESA_FORMAT_SARGB8
;
183 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
:
184 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
:
185 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
:
186 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
:
187 return MESA_FORMAT_SRGB_DXT1
;
189 /* i915 could also do this */
192 return MESA_FORMAT_DUDV8
;
195 return MESA_FORMAT_SIGNED_RGBA8888_REV
;
199 fprintf(stderr
, "unexpected texture format %s in %s\n",
200 _mesa_lookup_enum_by_nr(internalFormat
), __FUNCTION__
);
201 return MESA_FORMAT_NONE
;
204 return MESA_FORMAT_NONE
; /* never get here */
207 int intel_compressed_num_bytes(GLuint mesaFormat
)
212 block_size
= _mesa_get_format_bytes(mesaFormat
);
213 _mesa_get_format_block_size(mesaFormat
, &bw
, &bh
);
215 return block_size
/ bw
;