comparison: src/shader.c
src/shader.c
- changeset 160
- 80700db530ff
- parent 158
- f650994ec543
equal
deleted
inserted
replaced
| 159:da7ebfcdd159 | 160:80700db530ff |
|---|---|
| 42 * The ID of the returned shader will be zero when something went wrong. | 42 * The ID of the returned shader will be zero when something went wrong. |
| 43 * | 43 * |
| 44 * @param type the shader type (use the GL enum) | 44 * @param type the shader type (use the GL enum) |
| 45 * @param code the source code | 45 * @param code the source code |
| 46 * @param code_pp the optional preprocessor code | 46 * @param code_pp the optional preprocessor code |
| 47 * @param code_pp_list list of optional preprocessor code | |
| 48 * @param code_pp_list_select selection flags for the preprocessor code list | |
| 47 * @return the compiled shader | 49 * @return the compiled shader |
| 48 */ | 50 */ |
| 49 static unsigned asc_shader_compile(unsigned int type, const char *code, const char *code_pp) { | 51 static unsigned asc_shader_compile(unsigned int type, const char *code, const char *code_pp, |
| 52 const char * const *code_pp_list, unsigned short code_pp_list_select) { | |
| 50 GLuint id = glCreateShader(type); | 53 GLuint id = glCreateShader(type); |
| 51 if (id == 0) { | 54 if (id == 0) { |
| 52 asc_error("glCreateShader failed: %s", glGetError()); | 55 asc_error("glCreateShader failed: %s", glGetError()); |
| 53 return 0; | 56 return 0; |
| 54 } | 57 } |
| 55 | 58 |
| 56 // some drivers don't like NULL strings, even when length is zero | |
| 57 if (code_pp == NULL) code_pp = ""; | |
| 58 | |
| 59 GLint success; | 59 GLint success; |
| 60 const char *code_array[4] = { | 60 const char *code_array[20]; |
| 61 "#version 400 core\n", | 61 GLsizei code_count = 0; |
| 62 code_pp, | 62 code_array[code_count++] = "#version 400 core\n"; |
| 63 "\n#line 1\n", | 63 if (code_pp != NULL) code_array[code_count++] = code_pp; |
| 64 code | 64 unsigned test_flag = 1; |
| 65 }; | 65 unsigned select_index = 0; |
| 66 GLint length_array[4]; | 66 while (test_flag <= code_pp_list_select) { |
| 67 for (unsigned int i = 0; i < cx_nmemb(length_array); i++) { | 67 if (asc_test_flag(code_pp_list_select, test_flag)) { |
| 68 code_array[code_count++] = code_pp_list[select_index]; | |
| 69 } | |
| 70 select_index++; | |
| 71 test_flag <<= 1; | |
| 72 } | |
| 73 code_array[code_count++] = "\n#line 1\n"; | |
| 74 code_array[code_count++] = code; | |
| 75 | |
| 76 // compute the lengths | |
| 77 GLint length_array[20]; | |
| 78 for (int i = 0; i < code_count ; i++) { | |
| 68 length_array[i] = (GLint) strlen(code_array[i]); | 79 length_array[i] = (GLint) strlen(code_array[i]); |
| 69 } | 80 } |
| 70 | 81 |
| 71 // compile | 82 // compile |
| 72 glShaderSource(id, cx_nmemb(length_array), code_array, length_array); | 83 glShaderSource(id, code_count, code_array, length_array); |
| 73 glCompileShader(id); | 84 glCompileShader(id); |
| 74 glGetShaderiv(id, GL_COMPILE_STATUS, &success); | 85 glGetShaderiv(id, GL_COMPILE_STATUS, &success); |
| 75 if (success) { | 86 if (success) { |
| 76 asc_dprintf("Shader %u compiled", id); | 87 asc_dprintf("Shader %u compiled", id); |
| 77 return id; | 88 return id; |
| 143 void *asc_shader_create(AscShaderCodes codes, size_t mem_size) { | 154 void *asc_shader_create(AscShaderCodes codes, size_t mem_size) { |
| 144 AscShaderProgram *prog = cxZallocDefault(mem_size); | 155 AscShaderProgram *prog = cxZallocDefault(mem_size); |
| 145 unsigned shader[2]; | 156 unsigned shader[2]; |
| 146 unsigned n = 0; | 157 unsigned n = 0; |
| 147 if (codes.vtx) { | 158 if (codes.vtx) { |
| 148 shader[n++] = asc_shader_compile(GL_VERTEX_SHADER, codes.vtx, codes.vtx_pp); | 159 shader[n++] = asc_shader_compile(GL_VERTEX_SHADER, codes.vtx, codes.vtx_pp, codes.vtx_pp_list, codes.vtx_pp_list_select); |
| 149 } | 160 } |
| 150 if (codes.frag) { | 161 if (codes.frag) { |
| 151 shader[n++] = asc_shader_compile(GL_FRAGMENT_SHADER, codes.frag, codes.frag_pp); | 162 shader[n++] = asc_shader_compile(GL_FRAGMENT_SHADER, codes.frag, codes.frag_pp, codes.frag_pp_list, codes.frag_pp_list_select); |
| 152 } | 163 } |
| 153 if (asc_shader_link(shader, n, prog)) { | 164 if (asc_shader_link(shader, n, prog)) { |
| 154 cxFreeDefault(prog); | 165 cxFreeDefault(prog); |
| 155 prog = NULL; | 166 prog = NULL; |
| 156 } | 167 } |
| 195 | 206 |
| 196 int asc_shader_load_code_files(AscShaderCodeInfo info, AscShaderCodes *codes) { | 207 int asc_shader_load_code_files(AscShaderCodeInfo info, AscShaderCodes *codes) { |
| 197 int ret = 0; | 208 int ret = 0; |
| 198 ret |= asc_shader_load_code_file(info.files.vtx, &codes->vtx); | 209 ret |= asc_shader_load_code_file(info.files.vtx, &codes->vtx); |
| 199 codes->vtx_pp = info.defines.vtx; | 210 codes->vtx_pp = info.defines.vtx; |
| 211 codes->vtx_pp_list = info.defines.vtx_list; | |
| 212 codes->vtx_pp_list_select = info.defines.vtx_list_select; | |
| 200 ret |= asc_shader_load_code_file(info.files.frag, &codes->frag); | 213 ret |= asc_shader_load_code_file(info.files.frag, &codes->frag); |
| 201 codes->frag_pp = info.defines.frag; | 214 codes->frag_pp = info.defines.frag; |
| 215 codes->frag_pp_list = info.defines.frag_list; | |
| 216 codes->frag_pp_list_select = info.defines.frag_list_select; | |
| 202 return ret; | 217 return ret; |
| 203 } | 218 } |
| 204 | 219 |
| 205 void asc_shader_free_codes(AscShaderCodes codes) { | 220 void asc_shader_free_codes(AscShaderCodes codes) { |
| 206 cxFreeDefault(codes.vtx); | 221 cxFreeDefault(codes.vtx); |
