X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=util.cpp;h=3141f8d2c5eb388aec128f31b6218c06c0b1bb8d;hp=2176786978544994fcb733a4a2bea5f6fb9f77f5;hb=refs%2Fheads%2F1.3.x-release;hpb=758f632c42befae7f2b7af137554429fa544d4cb diff --git a/util.cpp b/util.cpp index 2176786..3141f8d 100644 --- a/util.cpp +++ b/util.cpp @@ -1,14 +1,33 @@ -#define GL_GLEXT_PROTOTYPES 1 - -#include +#include #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 { + +extern string *movit_data_directory; + void hsv2rgb(float h, float s, float v, float *r, float *g, float *b) { if (h < 0.0f) { @@ -50,26 +69,80 @@ void hsv2rgb(float h, float s, float v, float *r, float *g, float *b) *b += m; } -std::string read_file(const std::string &filename) +void hsv2rgb_normalized(float h, float s, float v, float *r, float *g, float *b) { - static char buf[131072]; - FILE *fp = fopen(filename.c_str(), "r"); + float ref_r, ref_g, ref_b; + hsv2rgb(h, s, v, r, g, b); + hsv2rgb(h, 0.0f, v, &ref_r, &ref_g, &ref_b); + float lum = 0.2126 * *r + 0.7152 * *g + 0.0722 * *b; + float ref_lum = 0.2126 * ref_r + 0.7152 * ref_g + 0.0722 * ref_b; + if (lum > 1e-3) { + float fac = ref_lum / lum; + *r *= fac; + *g *= fac; + *b *= fac; + } +} + +string read_file(const string &filename) +{ + const string full_pathname = *movit_data_directory + "/" + filename; + + FILE *fp = fopen(full_pathname.c_str(), "r"); if (fp == NULL) { - perror(filename.c_str()); + 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 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); + } } -GLhandleARB compile_shader(const std::string &shader_src, GLenum type) +GLuint compile_shader(const string &shader_src, GLenum type) { - GLhandleARB obj = glCreateShaderObjectARB(type); + GLuint obj = glCreateShader(type); const GLchar* source[] = { shader_src.data() }; - const GLint length[] = { shader_src.size() }; + const GLint length[] = { (GLint)shader_src.size() }; glShaderSource(obj, 1, source, length); glCompileShader(obj); @@ -77,56 +150,208 @@ GLhandleARB compile_shader(const std::string &shader_src, GLenum type) 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); + if (strlen(info_log) > 0) { + fprintf(stderr, "Shader compile log: %s\n", info_log); + } GLint status; glGetShaderiv(obj, GL_COMPILE_STATUS, &status); if (status == GL_FALSE) { + fprintf(stderr, "Failed to compile shader: %s\n", shader_src.c_str()); exit(1); } return obj; } -void multiply_3x3_matrices(const Matrix3x3 a, const Matrix3x3 b, Matrix3x3 result) +void print_3x3_matrix(const Eigen::Matrix3d& m) { - result[0] = a[0] * b[0] + a[3] * b[1] + a[6] * b[2]; - result[1] = a[1] * b[0] + a[4] * b[1] + a[7] * b[2]; - result[2] = a[2] * b[0] + a[5] * b[1] + a[8] * b[2]; + printf("%6.4f %6.4f %6.4f\n", m(0,0), m(0,1), m(0,2)); + printf("%6.4f %6.4f %6.4f\n", m(1,0), m(1,1), m(1,2)); + printf("%6.4f %6.4f %6.4f\n", m(2,0), m(2,1), m(2,2)); + printf("\n"); +} - result[3] = a[0] * b[3] + a[3] * b[4] + a[6] * b[5]; - result[4] = a[1] * b[3] + a[4] * b[4] + a[7] * b[5]; - result[5] = a[2] * b[3] + a[5] * b[4] + a[8] * b[5]; +string output_glsl_mat3(const string &name, const Eigen::Matrix3d &m) +{ + // 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(); +} - result[6] = a[0] * b[6] + a[3] * b[7] + a[6] * b[8]; - result[7] = a[1] * b[6] + a[4] * b[7] + a[7] * b[8]; - result[8] = a[2] * b[6] + a[5] * b[7] + a[8] * b[8]; +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(); } -void invert_3x3_matrix(const Matrix3x3 m, Matrix3x3 result) +string output_glsl_vec2(const string &name, float x, float y) { - double inv_det = 1.0 / ( - m[6] * m[1] * m[5] - m[6] * m[2] * m[4] - - m[3] * m[1] * m[8] + m[3] * m[2] * m[7] + - m[0] * m[4] * m[8] - m[0] * m[5] * m[7]); + // 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(); +} + +template +void combine_two_samples(float w1, float w2, float pos1, float pos2, float num_subtexels, float inv_num_subtexels, + DestFloat *offset, DestFloat *total_weight, float *sum_sq_error) +{ + assert(movit_initialized); + assert(w1 * w2 >= 0.0f); // Should not have differing signs. + float z; // Normalized 0..1 between pos1 and pos2. + if (fabs(w1 + w2) < 1e-6) { + z = 0.5f; + } else { + z = w2 / (w1 + w2); + } + + // Round to the desired precision. Note that this might take z outside the 0..1 range. + *offset = from_fp32(pos1 + z * (pos2 - pos1)); + z = (to_fp32(*offset) - pos1) / (pos2 - pos1); - result[0] = inv_det * (m[4] * m[8] - m[5] * m[7]); - result[1] = inv_det * (m[2] * m[7] - m[1] * m[8]); - result[2] = inv_det * (m[1] * m[5] - m[2] * m[4]); + // 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 * num_subtexels) * inv_num_subtexels; + + // 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 = from_fp32((w1 + z * (w2 - w1)) / (z * z + (1 - z) * (1 - z))); - result[3] = inv_det * (m[6] * m[5] - m[3] * m[8]); - result[4] = inv_det * (m[0] * m[8] - m[6] * m[2]); - result[5] = inv_det * (m[3] * m[2] - m[0] * m[5]); + if (sum_sq_error != NULL) { + float err1 = to_fp32(*total_weight) * (1 - z) - w1; + float err2 = to_fp32(*total_weight) * z - w2; + *sum_sq_error = err1 * err1 + err2 * err2; + } +} + +// Explicit instantiations. +template +void combine_two_samples(float w1, float w2, float pos1, float pos2, float num_subtexels, float inv_num_subtexels, + float *offset, float *total_weight, float *sum_sq_error); - result[6] = inv_det * (m[3] * m[7] - m[6] * m[4]); - result[7] = inv_det * (m[6] * m[1] - m[0] * m[7]); - result[8] = inv_det * (m[0] * m[4] - m[3] * m[1]); +template +void combine_two_samples(float w1, float w2, float pos1, float pos2, float num_subtexels, float inv_num_subtexels, + fp16_int_t *offset, fp16_int_t *total_weight, float *sum_sq_error); + +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; } -void print_3x3_matrix(const Matrix3x3 m) +GLuint fill_vertex_attribute(GLuint glsl_program_num, const string &attribute_name, GLint size, GLenum type, GLsizeiptr data_size, const GLvoid *data) { - printf("%6.4f %6.4f %6.4f\n", m[0], m[3], m[6]); - printf("%6.4f %6.4f %6.4f\n", m[1], m[4], m[7]); - printf("%6.4f %6.4f %6.4f\n", m[2], m[5], m[8]); - printf("\n"); + 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)); + 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; + } + + 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 != NULL) { + return ret; + } + return (void *)glXGetCurrentContext(); +#endif +} + +} // namespace movit