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      1 /*
      2 * Copyright (C) 2011 The Android Open Source Project
      3 *
      4 * Licensed under the Apache License, Version 2.0 (the "License");
      5 * you may not use this file except in compliance with the License.
      6 * You may obtain a copy of the License at
      7 *
      8 * http://www.apache.org/licenses/LICENSE-2.0
      9 *
     10 * Unless required by applicable law or agreed to in writing, software
     11 * distributed under the License is distributed on an "AS IS" BASIS,
     12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13 * See the License for the specific language governing permissions and
     14 * limitations under the License.
     15 */
     16 #include "glUtils.h"
     17 #include <string.h>
     18 #include "ErrorLog.h"
     19 #include <IOStream.h>
     20 
     21 size_t glSizeof(GLenum type)
     22 {
     23     size_t retval = 0;
     24     switch(type) {
     25     case GL_BYTE:
     26     case GL_UNSIGNED_BYTE:
     27         retval = 1;
     28         break;
     29     case GL_SHORT:
     30     case GL_UNSIGNED_SHORT:
     31     case GL_HALF_FLOAT_OES:
     32         retval = 2;
     33         break;
     34     case GL_UNSIGNED_INT:
     35     case GL_INT:
     36     case GL_FLOAT:
     37     case GL_FIXED:
     38     case GL_BOOL:
     39         retval =  4;
     40         break;
     41 #ifdef GL_DOUBLE
     42     case GL_DOUBLE:
     43         retval = 8;
     44         break;
     45 #endif
     46     case GL_FLOAT_VEC2:
     47     case GL_INT_VEC2:
     48     case GL_BOOL_VEC2:
     49         retval = 8;
     50         break;
     51     case GL_INT_VEC3:
     52     case GL_BOOL_VEC3:
     53     case GL_FLOAT_VEC3:
     54         retval = 12;
     55         break;
     56     case GL_FLOAT_VEC4:
     57     case GL_BOOL_VEC4:
     58     case GL_INT_VEC4:
     59     case GL_FLOAT_MAT2:
     60         retval = 16;
     61         break;
     62     case GL_FLOAT_MAT3:
     63         retval = 36;
     64         break;
     65     case GL_FLOAT_MAT4:
     66         retval = 64;
     67         break;
     68     case GL_SAMPLER_2D:
     69     case GL_SAMPLER_CUBE:
     70         retval = 4;
     71         break;
     72     default:
     73         ERR("**** ERROR unknown type 0x%x (%s,%d)\n", type, __FUNCTION__,__LINE__);
     74     }
     75     return retval;
     76 
     77 }
     78 
     79 size_t glUtilsParamSize(GLenum param)
     80 {
     81     size_t s = 0;
     82 
     83     switch(param)
     84     {
     85     case GL_DEPTH_TEST:
     86     case GL_DEPTH_FUNC:
     87     case GL_DEPTH_BITS:
     88     case GL_MAX_CLIP_PLANES:
     89     case GL_GREEN_BITS:
     90     case GL_MAX_MODELVIEW_STACK_DEPTH:
     91     case GL_MAX_PROJECTION_STACK_DEPTH:
     92     case GL_MAX_TEXTURE_STACK_DEPTH:
     93     case GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES:
     94     case GL_IMPLEMENTATION_COLOR_READ_TYPE_OES:
     95     case GL_NUM_COMPRESSED_TEXTURE_FORMATS:
     96     case GL_MAX_TEXTURE_SIZE:
     97     case GL_TEXTURE_GEN_MODE_OES:
     98     case GL_TEXTURE_ENV_MODE:
     99     case GL_FOG_MODE:
    100     case GL_FOG_DENSITY:
    101     case GL_FOG_START:
    102     case GL_FOG_END:
    103     case GL_SPOT_EXPONENT:
    104     case GL_CONSTANT_ATTENUATION:
    105     case GL_LINEAR_ATTENUATION:
    106     case GL_QUADRATIC_ATTENUATION:
    107     case GL_SHININESS:
    108     case GL_LIGHT_MODEL_TWO_SIDE:
    109     case GL_POINT_SIZE:
    110     case GL_POINT_SIZE_MIN:
    111     case GL_POINT_SIZE_MAX:
    112     case GL_POINT_FADE_THRESHOLD_SIZE:
    113     case GL_CULL_FACE:
    114     case GL_CULL_FACE_MODE:
    115     case GL_FRONT_FACE:
    116     case GL_SHADE_MODEL:
    117     case GL_DEPTH_WRITEMASK:
    118     case GL_DEPTH_CLEAR_VALUE:
    119     case GL_STENCIL_FAIL:
    120     case GL_STENCIL_PASS_DEPTH_FAIL:
    121     case GL_STENCIL_PASS_DEPTH_PASS:
    122     case GL_STENCIL_REF:
    123     case GL_STENCIL_WRITEMASK:
    124     case GL_MATRIX_MODE:
    125     case GL_MODELVIEW_STACK_DEPTH:
    126     case GL_PROJECTION_STACK_DEPTH:
    127     case GL_TEXTURE_STACK_DEPTH:
    128     case GL_ALPHA_TEST_FUNC:
    129     case GL_ALPHA_TEST_REF:
    130     case GL_ALPHA_TEST:
    131     case GL_DITHER:
    132     case GL_BLEND_DST:
    133     case GL_BLEND_SRC:
    134     case GL_BLEND:
    135     case GL_LOGIC_OP_MODE:
    136     case GL_SCISSOR_TEST:
    137     case GL_MAX_TEXTURE_UNITS:
    138     case GL_ACTIVE_TEXTURE:
    139     case GL_ALPHA_BITS:
    140     case GL_ARRAY_BUFFER_BINDING:
    141     case GL_BLUE_BITS:
    142     case GL_CLIENT_ACTIVE_TEXTURE:
    143     case GL_CLIP_PLANE0:
    144     case GL_CLIP_PLANE1:
    145     case GL_CLIP_PLANE2:
    146     case GL_CLIP_PLANE3:
    147     case GL_CLIP_PLANE4:
    148     case GL_CLIP_PLANE5:
    149     case GL_COLOR_ARRAY:
    150     case GL_COLOR_ARRAY_BUFFER_BINDING:
    151     case GL_COLOR_ARRAY_SIZE:
    152     case GL_COLOR_ARRAY_STRIDE:
    153     case GL_COLOR_ARRAY_TYPE:
    154     case GL_COLOR_LOGIC_OP:
    155     case GL_COLOR_MATERIAL:
    156     case GL_PACK_ALIGNMENT:
    157     case GL_PERSPECTIVE_CORRECTION_HINT:
    158     case GL_POINT_SIZE_ARRAY_BUFFER_BINDING_OES:
    159     case GL_POINT_SIZE_ARRAY_STRIDE_OES:
    160     case GL_POINT_SIZE_ARRAY_TYPE_OES:
    161     case GL_POINT_SMOOTH:
    162     case GL_POINT_SMOOTH_HINT:
    163     case GL_POINT_SPRITE_OES:
    164     case GL_COORD_REPLACE_OES:
    165     case GL_COMBINE_ALPHA:
    166     case GL_SRC0_RGB:
    167     case GL_SRC1_RGB:
    168     case GL_SRC2_RGB:
    169     case GL_OPERAND0_RGB:
    170     case GL_OPERAND1_RGB:
    171     case GL_OPERAND2_RGB:
    172     case GL_SRC0_ALPHA:
    173     case GL_SRC1_ALPHA:
    174     case GL_SRC2_ALPHA:
    175     case GL_OPERAND0_ALPHA:
    176     case GL_OPERAND1_ALPHA:
    177     case GL_OPERAND2_ALPHA:
    178     case GL_RGB_SCALE:
    179     case GL_ALPHA_SCALE:
    180     case GL_COMBINE_RGB:
    181     case GL_POLYGON_OFFSET_FACTOR:
    182     case GL_POLYGON_OFFSET_FILL:
    183     case GL_POLYGON_OFFSET_UNITS:
    184     case GL_RED_BITS:
    185     case GL_RESCALE_NORMAL:
    186     case GL_SAMPLE_ALPHA_TO_COVERAGE:
    187     case GL_SAMPLE_ALPHA_TO_ONE:
    188     case GL_SAMPLE_BUFFERS:
    189     case GL_SAMPLE_COVERAGE:
    190     case GL_SAMPLE_COVERAGE_INVERT:
    191     case GL_SAMPLE_COVERAGE_VALUE:
    192     case GL_SAMPLES:
    193     case GL_MAX_SAMPLES_EXT:
    194     case GL_STENCIL_BITS:
    195     case GL_STENCIL_CLEAR_VALUE:
    196     case GL_STENCIL_FUNC:
    197     case GL_STENCIL_TEST:
    198     case GL_STENCIL_VALUE_MASK:
    199     case GL_STENCIL_BACK_FUNC:
    200     case GL_STENCIL_BACK_VALUE_MASK:
    201     case GL_STENCIL_BACK_REF:
    202     case GL_STENCIL_BACK_FAIL:
    203     case GL_STENCIL_BACK_PASS_DEPTH_FAIL:
    204     case GL_STENCIL_BACK_PASS_DEPTH_PASS:
    205     case GL_STENCIL_BACK_WRITEMASK:
    206     case GL_TEXTURE_2D:
    207     case GL_TEXTURE_BINDING_2D:
    208     case GL_TEXTURE_BINDING_CUBE_MAP:
    209     case GL_TEXTURE_BINDING_EXTERNAL_OES:
    210     case GL_TEXTURE_COORD_ARRAY:
    211     case GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING:
    212     case GL_TEXTURE_COORD_ARRAY_SIZE:
    213     case GL_TEXTURE_COORD_ARRAY_STRIDE:
    214     case GL_TEXTURE_COORD_ARRAY_TYPE:
    215     case GL_UNPACK_ALIGNMENT:
    216     case GL_VERTEX_ARRAY:
    217     case GL_VERTEX_ARRAY_BUFFER_BINDING:
    218     case GL_VERTEX_ARRAY_SIZE:
    219     case GL_VERTEX_ARRAY_STRIDE:
    220     case GL_VERTEX_ARRAY_TYPE:
    221     case GL_SPOT_CUTOFF:
    222     case GL_TEXTURE_MIN_FILTER:
    223     case GL_TEXTURE_MAG_FILTER:
    224     case GL_TEXTURE_WRAP_S:
    225     case GL_TEXTURE_WRAP_T:
    226     case GL_GENERATE_MIPMAP:
    227     case GL_GENERATE_MIPMAP_HINT:
    228     case GL_RENDERBUFFER_WIDTH_OES:
    229     case GL_RENDERBUFFER_HEIGHT_OES:
    230     case GL_RENDERBUFFER_INTERNAL_FORMAT_OES:
    231     case GL_RENDERBUFFER_RED_SIZE_OES:
    232     case GL_RENDERBUFFER_GREEN_SIZE_OES:
    233     case GL_RENDERBUFFER_BLUE_SIZE_OES:
    234     case GL_RENDERBUFFER_ALPHA_SIZE_OES:
    235     case GL_RENDERBUFFER_DEPTH_SIZE_OES:
    236     case GL_RENDERBUFFER_STENCIL_SIZE_OES:
    237     case GL_RENDERBUFFER_BINDING:
    238     case GL_FRAMEBUFFER_BINDING:
    239     case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_OES:
    240     case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_OES:
    241     case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_OES:
    242     case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_OES:
    243     case GL_FENCE_STATUS_NV:
    244     case GL_FENCE_CONDITION_NV:
    245     case GL_TEXTURE_WIDTH_QCOM:
    246     case GL_TEXTURE_HEIGHT_QCOM:
    247     case GL_TEXTURE_DEPTH_QCOM:
    248     case GL_TEXTURE_INTERNAL_FORMAT_QCOM:
    249     case GL_TEXTURE_FORMAT_QCOM:
    250     case GL_TEXTURE_TYPE_QCOM:
    251     case GL_TEXTURE_IMAGE_VALID_QCOM:
    252     case GL_TEXTURE_NUM_LEVELS_QCOM:
    253     case GL_TEXTURE_TARGET_QCOM:
    254     case GL_TEXTURE_OBJECT_VALID_QCOM:
    255     case GL_BLEND_EQUATION_RGB_OES:
    256     case GL_BLEND_EQUATION_ALPHA_OES:
    257     case GL_BLEND_DST_RGB_OES:
    258     case GL_BLEND_SRC_RGB_OES:
    259     case GL_BLEND_DST_ALPHA_OES:
    260     case GL_BLEND_SRC_ALPHA_OES:
    261     case GL_MAX_LIGHTS:
    262     case GL_SHADER_TYPE:
    263     case GL_DELETE_STATUS:
    264     case GL_COMPILE_STATUS:
    265     case GL_INFO_LOG_LENGTH:
    266     case GL_SHADER_SOURCE_LENGTH:
    267     case GL_CURRENT_PROGRAM:
    268     case GL_LINK_STATUS:
    269     case GL_VALIDATE_STATUS:
    270     case GL_ATTACHED_SHADERS:
    271     case GL_ACTIVE_UNIFORMS:
    272     case GL_ACTIVE_ATTRIBUTES:
    273     case GL_SUBPIXEL_BITS:
    274     case GL_MAX_CUBE_MAP_TEXTURE_SIZE:
    275     case GL_NUM_SHADER_BINARY_FORMATS:
    276     case GL_SHADER_COMPILER:
    277     case GL_MAX_VERTEX_ATTRIBS:
    278     case GL_MAX_VERTEX_UNIFORM_VECTORS:
    279     case GL_MAX_VARYING_VECTORS:
    280     case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
    281     case GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
    282     case GL_MAX_FRAGMENT_UNIFORM_VECTORS:
    283     case GL_MAX_RENDERBUFFER_SIZE:
    284     case GL_MAX_TEXTURE_IMAGE_UNITS:
    285     case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
    286     case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES:
    287     case GL_LINE_WIDTH:
    288         s = 1;
    289         break;
    290     case GL_ALIASED_LINE_WIDTH_RANGE:
    291     case GL_ALIASED_POINT_SIZE_RANGE:
    292     case GL_DEPTH_RANGE:
    293     case GL_MAX_VIEWPORT_DIMS:
    294     case GL_SMOOTH_POINT_SIZE_RANGE:
    295     case GL_SMOOTH_LINE_WIDTH_RANGE:
    296         s= 2;
    297         break;
    298     case GL_SPOT_DIRECTION:
    299     case GL_POINT_DISTANCE_ATTENUATION:
    300     case GL_CURRENT_NORMAL:
    301         s =  3;
    302         break;
    303     case GL_CURRENT_VERTEX_ATTRIB:
    304     case GL_CURRENT_TEXTURE_COORDS:
    305     case GL_CURRENT_COLOR:
    306     case GL_FOG_COLOR:
    307     case GL_AMBIENT:
    308     case GL_DIFFUSE:
    309     case GL_SPECULAR:
    310     case GL_EMISSION:
    311     case GL_POSITION:
    312     case GL_LIGHT_MODEL_AMBIENT:
    313     case GL_TEXTURE_ENV_COLOR:
    314     case GL_SCISSOR_BOX:
    315     case GL_VIEWPORT:
    316     case GL_TEXTURE_CROP_RECT_OES:
    317     case GL_COLOR_CLEAR_VALUE:
    318     case GL_COLOR_WRITEMASK:
    319     case GL_AMBIENT_AND_DIFFUSE:
    320     case GL_BLEND_COLOR:
    321         s =  4;
    322         break;
    323     case GL_MODELVIEW_MATRIX:
    324     case GL_PROJECTION_MATRIX:
    325     case GL_TEXTURE_MATRIX:
    326         s = 16;
    327     break;
    328     default:
    329         ERR("glUtilsParamSize: unknow param 0x%08x\n", param);
    330         s = 1; // assume 1
    331     }
    332     return s;
    333 }
    334 
    335 void glUtilsPackPointerData(unsigned char *dst, unsigned char *src,
    336                      int size, GLenum type, unsigned int stride,
    337                      unsigned int datalen)
    338 {
    339     unsigned int  vsize = size * glSizeof(type);
    340     if (stride == 0) stride = vsize;
    341 
    342     if (stride == vsize) {
    343         memcpy(dst, src, datalen);
    344     } else {
    345         for (unsigned int i = 0; i < datalen; i += vsize) {
    346             memcpy(dst, src, vsize);
    347             dst += vsize;
    348             src += stride;
    349         }
    350     }
    351 }
    352 
    353 void glUtilsWritePackPointerData(void* _stream, unsigned char *src,
    354                                  int size, GLenum type, unsigned int stride,
    355                                  unsigned int datalen)
    356 {
    357     IOStream* stream = reinterpret_cast<IOStream*>(_stream);
    358 
    359     unsigned int  vsize = size * glSizeof(type);
    360     if (stride == 0) stride = vsize;
    361 
    362     if (stride == vsize) {
    363         stream->writeFully(src, datalen);
    364     } else {
    365         for (unsigned int i = 0; i < datalen; i += vsize) {
    366             stream->writeFully(src, (size_t)vsize);
    367             src += stride;
    368         }
    369     }
    370 }
    371 
    372 int glUtilsPixelBitSize(GLenum format, GLenum type)
    373 {
    374     int components = 0;
    375     int componentsize = 0;
    376     int pixelsize = 0;
    377     switch(type) {
    378     case GL_BYTE:
    379     case GL_UNSIGNED_BYTE:
    380         componentsize = 8;
    381         break;
    382     case GL_SHORT:
    383     case GL_UNSIGNED_SHORT:
    384     case GL_UNSIGNED_SHORT_5_6_5:
    385     case GL_UNSIGNED_SHORT_4_4_4_4:
    386     case GL_UNSIGNED_SHORT_5_5_5_1:
    387     case GL_RGB565_OES:
    388     case GL_RGB5_A1_OES:
    389     case GL_RGBA4_OES:
    390         pixelsize = 16;
    391         break;
    392     case GL_INT:
    393     case GL_UNSIGNED_INT:
    394     case GL_FLOAT:
    395     case GL_FIXED:
    396     case GL_UNSIGNED_INT_24_8_OES:
    397         pixelsize = 32;
    398         break;
    399     default:
    400         ERR("glUtilsPixelBitSize: unknown pixel type - assuming pixel data 0\n");
    401         componentsize = 0;
    402     }
    403 
    404     if (pixelsize == 0) {
    405         switch(format) {
    406 #if 0
    407         case GL_RED:
    408         case GL_GREEN:
    409         case GL_BLUE:
    410 #endif
    411         case GL_ALPHA:
    412         case GL_LUMINANCE:
    413         case GL_DEPTH_COMPONENT:
    414         case GL_DEPTH_STENCIL_OES:
    415             components = 1;
    416             break;
    417         case GL_LUMINANCE_ALPHA:
    418             components = 2;
    419             break;
    420         case GL_RGB:
    421 #if 0
    422         case GL_BGR:
    423 #endif
    424             components = 3;
    425             break;
    426         case GL_RGBA:
    427         case GL_BGRA_EXT:
    428             components = 4;
    429             break;
    430         default:
    431             ERR("glUtilsPixelBitSize: unknown pixel format...\n");
    432             components = 0;
    433         }
    434         pixelsize = components * componentsize;
    435     }
    436 
    437     return pixelsize;
    438 }
    439 
    440 // pack a list of strings into one.
    441 void glUtilsPackStrings(char *ptr,  char **strings,  GLint *length, GLsizei count)
    442 {
    443     char *p = ptr;
    444     *p = '\0';
    445     for (int i = 0; i < count; i++) {
    446         int l=0;
    447         if (strings[i]!=NULL) {
    448             if (length == NULL || length[i] < 0) {
    449                 l = strlen(strings[i]);
    450                 strcat(p, strings[i]);
    451             } else {
    452                 l = length[i];
    453                 strncat(p, strings[i], l);
    454             }
    455         }
    456         p += l;
    457     }
    458 }
    459 
    460 // claculate the length of a list of strings
    461 int glUtilsCalcShaderSourceLen( char **strings,  GLint *length, GLsizei count)
    462 {
    463     int len = 0;
    464     for (int i = 0; i < count; i++) {
    465         int l;
    466         if (length == NULL || length[i] < 0) {
    467             l = strings[i]!=NULL ? strlen(strings[i]) : 0;
    468         } else {
    469             l = length[i];
    470         }
    471         len += l;
    472     }
    473     return len;
    474 
    475 }
    476