-GLhandleARB read_shader(const char* filename, GLenum type)
-{
- std::string shader_src = read_file(filename);
-
- GLhandleARB obj = glCreateShaderObjectARB(type);
- const GLchar* source[] = { shader_src.data() };
- const GLint length[] = { shader_src.size() };
- glShaderSource(obj, 1, source, length);
- glCompileShader(obj);
-
- GLchar info_log[4096];
- GLsizei log_length = sizeof(info_log) - 1;
- glGetShaderInfoLog(obj, log_length, &log_length, info_log);
- info_log[log_length] = 0;
- printf("shader compile log: %s\n", info_log);
-
- GLint status;
- glGetShaderiv(obj, GL_COMPILE_STATUS, &status);
- if (status == GL_FALSE) {
- exit(1);
- }
-
- return obj;
-}
-
-void draw_picture_quad(GLint prog, int frame)
-{
- glUseProgramObjectARB(prog);
- check_error();
-
- glActiveTexture(GL_TEXTURE0);
- glBindTexture(GL_TEXTURE_2D, SOURCE_IMAGE);
- glUniform1i(glGetUniformLocation(prog, "tex"), 0);
-
- glActiveTexture(GL_TEXTURE1);
- glBindTexture(GL_TEXTURE_1D, SRGB_LUT);
- glUniform1i(glGetUniformLocation(prog, "srgb_tex"), 1);
-
- glActiveTexture(GL_TEXTURE2);
- glBindTexture(GL_TEXTURE_1D, SRGB_REVERSE_LUT);
- glUniform1i(glGetUniformLocation(prog, "srgb_reverse_tex"), 2);
-
- glUniform3f(glGetUniformLocation(prog, "lift"), lift_r, lift_g, lift_b);
- //glUniform3f(glGetUniformLocation(prog, "gamma"), gamma_r, gamma_g, gamma_b);
- glUniform3f(glGetUniformLocation(prog, "inv_gamma_22"),
- 2.2f / gamma_r,
- 2.2f / gamma_g,
- 2.2f / gamma_b);
- glUniform3f(glGetUniformLocation(prog, "gain_pow_inv_gamma"),
- pow(gain_r, 1.0f / gamma_r),
- pow(gain_g, 1.0f / gamma_g),
- pow(gain_b, 1.0f / gamma_b));
- glUniform1f(glGetUniformLocation(prog, "saturation"), saturation);
-
- glDisable(GL_BLEND);
- check_error();
- glDisable(GL_DEPTH_TEST);
- check_error();
- glDepthMask(GL_FALSE);
- check_error();
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0);
-
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-
- glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
-// glClear(GL_COLOR_BUFFER_BIT);
- check_error();
-
- glBegin(GL_QUADS);
-
- glTexCoord2f(0.0f, 1.0f);
- glVertex2f(0.0f, 0.0f);
-
- glTexCoord2f(1.0f, 1.0f);
- glVertex2f(1.0f, 0.0f);
-
- glTexCoord2f(1.0f, 0.0f);
- glVertex2f(1.0f, 1.0f);
-
- glTexCoord2f(0.0f, 0.0f);
- glVertex2f(0.0f, 1.0f);
-
- glEnd();
- check_error();
-}
-