X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=util.cpp;h=9b018825d333e269e3e0007b0300165af563b28f;hp=62e0efcc314250505ea3513a159425e4a5a81580;hb=0323e7512fd7e3402ca6c5da7b30ce7bb007a060;hpb=29072985d0a00a53e5b578a1444cee61a0c9e1f2 diff --git a/util.cpp b/util.cpp index 62e0efc..9b01882 100644 --- a/util.cpp +++ b/util.cpp @@ -1,11 +1,32 @@ -#include +#include +#include #include +#include +#include #include -#include -#include +#include +#include +#include +#include -#include "util.h" +#include "fp16.h" #include "init.h" +#include "util.h" + +#if defined(__APPLE__) +#include +#elif defined(WIN32) +#include +#else +#include +#include +#endif + +using namespace std; + +namespace movit { + +extern string *movit_data_directory; void hsv2rgb(float h, float s, float v, float *r, float *g, float *b) { @@ -63,22 +84,61 @@ void hsv2rgb_normalized(float h, float s, float v, float *r, float *g, float *b) } } -std::string read_file(const std::string &filename) +string read_file(const string &filename) { - static char buf[131072]; - FILE *fp = fopen(filename.c_str(), "r"); - if (fp == NULL) { - perror(filename.c_str()); + const string full_pathname = *movit_data_directory + "/" + filename; + + FILE *fp = fopen(full_pathname.c_str(), "r"); + if (fp == nullptr) { + perror(full_pathname.c_str()); + exit(1); + } + + int ret = fseek(fp, 0, SEEK_END); + if (ret == -1) { + perror("fseek(SEEK_END)"); + exit(1); + } + + int size = ftell(fp); + + ret = fseek(fp, 0, SEEK_SET); + if (ret == -1) { + perror("fseek(SEEK_SET)"); exit(1); } - int len = fread(buf, 1, sizeof(buf), fp); + string str; + str.resize(size); + ret = fread(&str[0], size, 1, fp); + if (ret == -1) { + perror("fread"); + exit(1); + } + if (ret == 0) { + fprintf(stderr, "Short read when trying to read %d bytes from %s\n", + size, full_pathname.c_str()); + exit(1); + } fclose(fp); - return std::string(buf, len); + return str; +} + +string read_version_dependent_file(const string &base, const string &extension) +{ + if (movit_shader_model == MOVIT_GLSL_130) { + return read_file(base + ".130." + extension); + } else if (movit_shader_model == MOVIT_GLSL_150) { + return read_file(base + ".150." + extension); + } else if (movit_shader_model == MOVIT_ESSL_300) { + return read_file(base + ".300es." + extension); + } else { + assert(false); + } } -GLuint compile_shader(const std::string &shader_src, GLenum type) +GLuint compile_shader(const string &shader_src, GLenum type) { GLuint obj = glCreateShader(type); const GLchar* source[] = { shader_src.data() }; @@ -91,12 +151,25 @@ GLuint compile_shader(const std::string &shader_src, GLenum type) glGetShaderInfoLog(obj, log_length, &log_length, info_log); info_log[log_length] = 0; if (strlen(info_log) > 0) { - printf("shader compile log: %s\n", info_log); + fprintf(stderr, "Shader compile log: %s\n", info_log); } GLint status; glGetShaderiv(obj, GL_COMPILE_STATUS, &status); if (status == GL_FALSE) { + // Add some line numbers to easier identify compile errors. + string src_with_lines = "/* 1 */ "; + size_t lineno = 1; + for (char ch : shader_src) { + src_with_lines.push_back(ch); + if (ch == '\n') { + char buf[32]; + snprintf(buf, sizeof(buf), "/* %3zu */ ", ++lineno); + src_with_lines += buf; + } + } + + fprintf(stderr, "Failed to compile shader:\n%s\n", src_with_lines.c_str()); exit(1); } @@ -111,59 +184,168 @@ void print_3x3_matrix(const Eigen::Matrix3d& m) printf("\n"); } -std::string output_glsl_mat3(const std::string &name, const Eigen::Matrix3d &m) +string output_glsl_mat3(const string &name, const Eigen::Matrix3d &m) { - char buf[1024]; - sprintf(buf, - "const mat3 %s = mat3(\n" - " %.8f, %.8f, %.8f,\n" - " %.8f, %.8f, %.8f,\n" - " %.8f, %.8f, %.8f);\n\n", - name.c_str(), - m(0,0), m(1,0), m(2,0), - m(0,1), m(1,1), m(2,1), - m(0,2), m(1,2), m(2,2)); - return buf; + // Use stringstream to be independent of the current locale in a thread-safe manner. + stringstream ss; + ss.imbue(locale("C")); + ss.precision(8); + ss << scientific; + ss << "const mat3 " << name << " = mat3(\n"; + ss << " " << m(0,0) << ", " << m(1,0) << ", " << m(2,0) << ",\n"; + ss << " " << m(0,1) << ", " << m(1,1) << ", " << m(2,1) << ",\n"; + ss << " " << m(0,2) << ", " << m(1,2) << ", " << m(2,2) << ");\n\n"; + return ss.str(); } -void combine_two_samples(float w1, float w2, float *offset, float *total_weight, float *sum_sq_error) +string output_glsl_float(const string &name, float x) { - assert(movit_initialized); - assert(w1 * w2 >= 0.0f); // Should not have differing signs. - float z; // Just a shorter name for offset. - if (fabs(w1 + w2) < 1e-6) { - z = 0.5f; - } else { - z = w2 / (w1 + w2); + // Use stringstream to be independent of the current locale in a thread-safe manner. + stringstream ss; + ss.imbue(locale("C")); + ss.precision(8); + ss << scientific; + ss << "const float " << name << " = " << x << ";\n"; + return ss.str(); +} + +string output_glsl_vec2(const string &name, float x, float y) +{ + // Use stringstream to be independent of the current locale in a thread-safe manner. + stringstream ss; + ss.imbue(locale("C")); + ss.precision(8); + ss << scientific; + ss << "const vec2 " << name << " = vec2(" << x << ", " << y << ");\n"; + return ss.str(); +} + +string output_glsl_vec3(const string &name, float x, float y, float z) +{ + // Use stringstream to be independent of the current locale in a thread-safe manner. + stringstream ss; + ss.imbue(locale("C")); + ss.precision(8); + ss << scientific; + ss << "const vec3 " << name << " = vec3(" << x << ", " << y << ", " << z << ");\n"; + return ss.str(); +} + +GLuint generate_vbo(GLint size, GLenum type, GLsizeiptr data_size, const GLvoid *data) +{ + GLuint vbo; + glGenBuffers(1, &vbo); + check_error(); + glBindBuffer(GL_ARRAY_BUFFER, vbo); + check_error(); + glBufferData(GL_ARRAY_BUFFER, data_size, data, GL_STATIC_DRAW); + check_error(); + glBindBuffer(GL_ARRAY_BUFFER, 0); + check_error(); + + return vbo; +} + +GLuint fill_vertex_attribute(GLuint glsl_program_num, const string &attribute_name, GLint size, GLenum type, GLsizeiptr data_size, const GLvoid *data) +{ + int attrib = glGetAttribLocation(glsl_program_num, attribute_name.c_str()); + if (attrib == -1) { + return -1; } - // Round to the minimum number of bits we have measured earlier. - // The card will do this for us anyway, but if we know what the real z - // is, we can pick a better total_weight below. - z = lrintf(z / movit_texel_subpixel_precision) * movit_texel_subpixel_precision; - - // Choose total weight w so that we minimize total squared error - // for the effective weights: - // - // e = (w(1-z) - a)² + (wz - b)² - // - // Differentiating by w and setting equal to zero: - // - // 2(w(1-z) - a)(1-z) + 2(wz - b)z = 0 - // w(1-z)² - a(1-z) + wz² - bz = 0 - // w((1-z)² + z²) = a(1-z) + bz - // w = (a(1-z) + bz) / ((1-z)² + z²) - // - // If z had infinite precision, this would simply reduce to w = w1 + w2. - *total_weight = (w1 * (1 - z) + w2 * z) / (z * z + (1 - z) * (1 - z)); - *offset = z; - - if (sum_sq_error != NULL) { - float err1 = *total_weight * (1 - z) - w1; - float err2 = *total_weight * z - w2; - *sum_sq_error = err1 * err1 + err2 * err2; + GLuint vbo = generate_vbo(size, type, data_size, data); + + glBindBuffer(GL_ARRAY_BUFFER, vbo); + check_error(); + glEnableVertexAttribArray(attrib); + check_error(); + glVertexAttribPointer(attrib, size, type, GL_FALSE, 0, BUFFER_OFFSET(0)); + check_error(); + glBindBuffer(GL_ARRAY_BUFFER, 0); + check_error(); + + return vbo; +} + +void cleanup_vertex_attribute(GLuint glsl_program_num, const string &attribute_name, GLuint vbo) +{ + int attrib = glGetAttribLocation(glsl_program_num, attribute_name.c_str()); + if (attrib == -1) { + return; } - assert(*offset >= 0.0f); - assert(*offset <= 1.0f); + glDisableVertexAttribArray(attrib); + check_error(); + glDeleteBuffers(1, &vbo); + check_error(); } + +unsigned div_round_up(unsigned a, unsigned b) +{ + return (a + b - 1) / b; +} + +// Algorithm from http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2. +unsigned next_power_of_two(unsigned v) +{ + v--; + v |= v >> 1; + v |= v >> 2; + v |= v >> 4; + v |= v >> 8; + v |= v >> 16; + v++; + return v; +} + +void *get_gl_context_identifier() +{ +#if defined(__APPLE__) + return (void *)CGLGetCurrentContext(); +#elif defined(WIN32) + return (void *)wglGetCurrentContext(); +#else + void *ret = (void *)eglGetCurrentContext(); + if (ret != nullptr) { + return ret; + } + return (void *)glXGetCurrentContext(); +#endif +} + +void abort_gl_error(GLenum err, const char *filename, int line) +{ + const char *err_text = "unknown"; + + // All errors listed in the glGetError(3G) man page. + switch (err) { + case GL_NO_ERROR: + err_text = "GL_NO_ERROR"; // Should not happen. + break; + case GL_INVALID_ENUM: + err_text = "GL_INVALID_ENUM"; + break; + case GL_INVALID_VALUE: + err_text = "GL_INVALID_VALUE"; + break; + case GL_INVALID_OPERATION: + err_text = "GL_INVALID_OPERATION"; + break; + case GL_INVALID_FRAMEBUFFER_OPERATION: + err_text = "GL_INVALID_FRAMEBUFFER_OPERATION"; + break; + case GL_OUT_OF_MEMORY: + err_text = "GL_OUT_OF_MEMORY"; + break; + case GL_STACK_UNDERFLOW: + err_text = "GL_STACK_UNDERFLOW"; + break; + case GL_STACK_OVERFLOW: + err_text = "GL_STACK_OVERFLOW"; + break; + } + fprintf(stderr, "GL error 0x%x (%s) at %s:%d\n", err, err_text, filename, line); + abort(); +} + +} // namespace movit