X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=util.cpp;h=9b018825d333e269e3e0007b0300165af563b28f;hp=8162f712d02eed8f5b47b7f481b977b827f56f8f;hb=0323e7512fd7e3402ca6c5da7b30ce7bb007a060;hpb=f3591ae239781d0587a141e14633e172ba9e376b diff --git a/util.cpp b/util.cpp index 8162f71..9b01882 100644 --- a/util.cpp +++ b/util.cpp @@ -1,14 +1,27 @@ -#include +#include #include #include #include #include #include +#include +#include +#include #include +#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 { @@ -75,17 +88,54 @@ string read_file(const string &filename) { const string full_pathname = *movit_data_directory + "/" + filename; - static char buf[131072]; FILE *fp = fopen(full_pathname.c_str(), "r"); - if (fp == NULL) { + if (fp == nullptr) { perror(full_pathname.c_str()); exit(1); } - int len = fread(buf, 1, sizeof(buf), fp); + 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); + } + + 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 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 string &shader_src, GLenum type) @@ -107,6 +157,19 @@ GLuint compile_shader(const string &shader_src, GLenum type) 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); } @@ -123,68 +186,53 @@ void print_3x3_matrix(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; -} - -void combine_two_samples(float w1, float w2, float *offset, float *total_weight, float *sum_sq_error) -{ - 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 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(); +} - // 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; - } +string output_glsl_float(const string &name, float x) +{ + // 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(); +} - assert(*offset >= 0.0f); - assert(*offset <= 1.0f); +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(); } -GLuint fill_vertex_attribute(GLuint glsl_program_num, const string &attribute_name, GLint size, GLenum type, GLsizeiptr data_size, const GLvoid *data) +string output_glsl_vec3(const string &name, float x, float y, float z) { - int attrib = glGetAttribLocation(glsl_program_num, attribute_name.c_str()); - if (attrib == -1) { - return -1; - } + // 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(); @@ -192,6 +240,23 @@ GLuint fill_vertex_attribute(GLuint glsl_program_num, const string &attribute_na 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; + } + + 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)); @@ -220,4 +285,67 @@ 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