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