diff options
Diffstat (limited to 'intern/opencolorio/ocio_impl_glsl.cc')
| -rw-r--r-- | intern/opencolorio/ocio_impl_glsl.cc | 164 |
1 files changed, 120 insertions, 44 deletions
diff --git a/intern/opencolorio/ocio_impl_glsl.cc b/intern/opencolorio/ocio_impl_glsl.cc index 1a3132fa4b3..a10afcad200 100644 --- a/intern/opencolorio/ocio_impl_glsl.cc +++ b/intern/opencolorio/ocio_impl_glsl.cc @@ -48,6 +48,8 @@ using namespace OCIO_NAMESPACE; static const int LUT3D_EDGE_SIZE = 64; +extern char datatoc_gpu_shader_display_transform_glsl[]; + /* **** OpenGL drawing routines using GLSL for color space transform ***** */ typedef struct OCIO_GLSLDrawState { @@ -60,42 +62,24 @@ typedef struct OCIO_GLSLDrawState { float *lut3d; /* 3D LUT table */ + bool curve_mapping_used; + bool curve_mapping_texture_allocated; + bool curve_mapping_texture_valid; + GLuint curve_mapping_texture; + size_t curve_mapping_cache_id; + /* Cache */ std::string lut3dcacheid; std::string shadercacheid; /* GLSL stuff */ - GLuint fragShader; + GLuint ocio_shader; GLuint program; /* Previous OpenGL state. */ GLint last_texture, last_texture_unit; } OCIO_GLSLDrawState; -/* Hardcoded to do alpha predivide before color space conversion */ -/* NOTE: This is true we only do de-premul here and NO premul - * and the reason is simple -- opengl is always configured - * for straight alpha at this moment - */ -static const char *g_fragShaderText = "" -"\n" -"uniform sampler2D tex1;\n" -"uniform sampler3D tex2;\n" -"uniform bool predivide;\n" -"\n" -"void main()\n" -"{\n" -" vec4 col = texture2D(tex1, gl_TexCoord[0].st);\n" -" if (predivide && col[3] > 0.0 && col[3] < 1.0) {\n" -" float inv_alpha = 1.0 / col[3];\n" -" col[0] *= inv_alpha;\n" -" col[1] *= inv_alpha;\n" -" col[2] *= inv_alpha;\n" -" }\n" -" gl_FragColor = OCIODisplay(col, tex2);\n" -"\n" -"}\n"; - static GLuint compileShaderText(GLenum shaderType, const char *text) { GLuint shader; @@ -117,15 +101,14 @@ static GLuint compileShaderText(GLenum shaderType, const char *text) return shader; } -static GLuint linkShaders(GLuint fragShader) +static GLuint linkShaders(GLuint ocio_shader) { - if (!fragShader) + if (!ocio_shader) return 0; GLuint program = glCreateProgram(); - if (fragShader) - glAttachShader(program, fragShader); + glAttachShader(program, ocio_shader); glLinkProgram(program); @@ -197,6 +180,37 @@ static bool ensureLUT3DAllocated(OCIO_GLSLDrawState *state) return state->lut3d_texture_valid; } +static bool ensureCurveMappingAllocated(OCIO_GLSLDrawState *state, OCIO_CurveMappingSettings *curve_mapping_settings) +{ + if (state->curve_mapping_texture_allocated) + return state->curve_mapping_texture_valid; + + glGenTextures(1, &state->curve_mapping_texture); + + glActiveTexture(GL_TEXTURE2); + glBindTexture(GL_TEXTURE_1D, state->curve_mapping_texture); + glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); + + /* clean glError buffer */ + while (glGetError() != GL_NO_ERROR) {} + + glTexImage1D(GL_TEXTURE_1D, 0, GL_RGBA16F_ARB, curve_mapping_settings->lut_size, + 0, GL_RGBA, GL_FLOAT, curve_mapping_settings->lut); + + state->curve_mapping_texture_allocated = true; + + /* GL_RGB16F_ARB could be not supported at some drivers + * in this case we could not use GLSL display + */ + state->curve_mapping_texture_valid = glGetError() == GL_NO_ERROR; + + return state->curve_mapping_texture_valid; +} + /* Detect if we can support GLSL drawing */ bool OCIOImpl::supportGLSLDraw() { @@ -214,9 +228,11 @@ bool OCIOImpl::supportGLSLDraw() * When all drawing is finished, finishGLSLDraw shall be called to * restore OpenGL context to it's pre-GLSL draw state. */ -bool OCIOImpl::setupGLSLDraw(OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRcPtr *processor, bool predivide) +bool OCIOImpl::setupGLSLDraw(OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRcPtr *processor, + OCIO_CurveMappingSettings *curve_mapping_settings, bool predivide) { ConstProcessorRcPtr ocio_processor = *(ConstProcessorRcPtr *) processor; + bool use_curve_mapping = curve_mapping_settings != NULL; /* Create state if needed. */ OCIO_GLSLDrawState *state; @@ -234,12 +250,36 @@ bool OCIOImpl::setupGLSLDraw(OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRc return false; } + if (use_curve_mapping) { + if (!ensureCurveMappingAllocated(state, curve_mapping_settings)) { + glActiveTexture(state->last_texture_unit); + glBindTexture(GL_TEXTURE_2D, state->last_texture); + + return false; + } + } + else { + if (state->curve_mapping_texture_allocated) { + glDeleteTextures(1, &state->curve_mapping_texture); + state->curve_mapping_texture_allocated = false; + } + } + /* Step 1: Create a GPU Shader Description */ GpuShaderDesc shaderDesc; shaderDesc.setLanguage(GPU_LANGUAGE_GLSL_1_0); shaderDesc.setFunctionName("OCIODisplay"); shaderDesc.setLut3DEdgeLen(LUT3D_EDGE_SIZE); + if (use_curve_mapping) { + if (state->curve_mapping_cache_id != curve_mapping_settings->cache_id) { + glActiveTexture(GL_TEXTURE2); + glBindTexture(GL_TEXTURE_1D, state->curve_mapping_texture); + glTexSubImage1D(GL_TEXTURE_1D, 0, 0, curve_mapping_settings->lut_size, + GL_RGBA, GL_FLOAT, curve_mapping_settings->lut); + } + } + /* Step 2: Compute the 3D LUT */ std::string lut3dCacheID = ocio_processor->getGpuLut3DCacheID(shaderDesc); if (lut3dCacheID != state->lut3dcacheid) { @@ -255,37 +295,73 @@ bool OCIOImpl::setupGLSLDraw(OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRc /* Step 3: Compute the Shader */ std::string shaderCacheID = ocio_processor->getGpuShaderTextCacheID(shaderDesc); - if (state->program == 0 || shaderCacheID != state->shadercacheid) { + if (state->program == 0 || + shaderCacheID != state->shadercacheid || + use_curve_mapping != state->curve_mapping_used) + { state->shadercacheid = shaderCacheID; + if (state->program) { + glDeleteProgram(state->program); + } + + if (state->ocio_shader) { + glDeleteShader(state->ocio_shader); + } + std::ostringstream os; - os << ocio_processor->getGpuShaderText(shaderDesc) << "\n"; - os << g_fragShaderText; - if (state->fragShader) - glDeleteShader(state->fragShader); + if (use_curve_mapping) { + os << "#define USE_CURVE_MAPPING\n"; + } - state->fragShader = compileShaderText(GL_FRAGMENT_SHADER, os.str().c_str()); + os << ocio_processor->getGpuShaderText(shaderDesc) << "\n"; + os << datatoc_gpu_shader_display_transform_glsl; - if (state->fragShader) { - if (state->program) - glDeleteProgram(state->program); + state->ocio_shader = compileShaderText(GL_FRAGMENT_SHADER, os.str().c_str()); - state->program = linkShaders(state->fragShader); + if (state->ocio_shader) { + state->program = linkShaders(state->ocio_shader); } + + state->curve_mapping_used = use_curve_mapping; } if (state->program) { glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_3D, state->lut3d_texture); + if (use_curve_mapping) { + glActiveTexture(GL_TEXTURE2); + glBindTexture(GL_TEXTURE_1D, state->curve_mapping_texture); + } + glActiveTexture(GL_TEXTURE0); glUseProgram(state->program); - glUniform1i(glGetUniformLocation(state->program, "tex1"), 0); - glUniform1i(glGetUniformLocation(state->program, "tex2"), 1); + + glUniform1i(glGetUniformLocation(state->program, "image_texture"), 0); + glUniform1i(glGetUniformLocation(state->program, "lut3d_texture"), 1); glUniform1i(glGetUniformLocation(state->program, "predivide"), predivide); + if (use_curve_mapping) { + glUniform1i(glGetUniformLocation(state->program, "curve_mapping_texture"), 2); + glUniform1i(glGetUniformLocation(state->program, "curve_mapping_lut_size"), curve_mapping_settings->lut_size); + glUniform4iv(glGetUniformLocation(state->program, "use_curve_mapping_extend_extrapolate"), 1, curve_mapping_settings->use_extend_extrapolate); + glUniform4fv(glGetUniformLocation(state->program, "curve_mapping_mintable"), 1, curve_mapping_settings->mintable); + glUniform4fv(glGetUniformLocation(state->program, "curve_mapping_range"), 1, curve_mapping_settings->range); + glUniform4fv(glGetUniformLocation(state->program, "curve_mapping_ext_in_x"), 1, curve_mapping_settings->ext_in_x); + glUniform4fv(glGetUniformLocation(state->program, "curve_mapping_ext_in_y"), 1, curve_mapping_settings->ext_in_y); + glUniform4fv(glGetUniformLocation(state->program, "curve_mapping_ext_out_x"), 1, curve_mapping_settings->ext_out_x); + glUniform4fv(glGetUniformLocation(state->program, "curve_mapping_ext_out_y"), 1, curve_mapping_settings->ext_out_y); + glUniform4fv(glGetUniformLocation(state->program, "curve_mapping_first_x"), 1, curve_mapping_settings->first_x); + glUniform4fv(glGetUniformLocation(state->program, "curve_mapping_first_y"), 1, curve_mapping_settings->first_y); + glUniform4fv(glGetUniformLocation(state->program, "curve_mapping_last_x"), 1, curve_mapping_settings->last_x); + glUniform4fv(glGetUniformLocation(state->program, "curve_mapping_last_y"), 1, curve_mapping_settings->last_y); + glUniform3fv(glGetUniformLocation(state->program, "curve_mapping_black"), 1, curve_mapping_settings->black); + glUniform3fv(glGetUniformLocation(state->program, "curve_mapping_bwmul"), 1, curve_mapping_settings->bwmul); + } + return true; } else { @@ -316,8 +392,8 @@ void OCIOImpl::freeGLState(struct OCIO_GLSLDrawState *state) if (state->program) glDeleteProgram(state->program); - if (state->fragShader) - glDeleteShader(state->fragShader); + if (state->ocio_shader) + glDeleteShader(state->ocio_shader); state->lut3dcacheid.~string(); state->shadercacheid.~string(); |