#include <string>
#include "init.h"
+#include "resource_pool.h"
#include "util.h"
using namespace std;
void measure_texel_subpixel_precision()
{
+ ResourcePool resource_pool;
static const unsigned width = 4096;
// Generate a destination texture to render to, and an FBO.
check_error();
glBindTexture(GL_TEXTURE_2D, dst_texnum);
check_error();
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, width, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, width, 1, 0, GL_RGBA, GL_FLOAT, NULL);
check_error();
glGenFramebuffers(1, &fbo);
float texdata[] = { 0, 1 };
glGenTextures(1, &src_texnum);
check_error();
- glBindTexture(GL_TEXTURE_1D, src_texnum);
+ glBindTexture(GL_TEXTURE_2D, src_texnum);
check_error();
- glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
check_error();
- glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
check_error();
- glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 2, 0, GL_LUMINANCE, GL_FLOAT, texdata);
- check_error();
- glEnable(GL_TEXTURE_1D);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_R16F, 2, 1, 0, GL_RED, GL_FLOAT, texdata);
check_error();
// Basic state.
glViewport(0, 0, width, 1);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0);
-
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
+ GLuint glsl_program_num = resource_pool.compile_glsl_program(
+ read_file("vs.vert"), read_file("texture1d.frag"));
+ glUseProgram(glsl_program_num);
+ check_error();
+ glUniform1i(glGetUniformLocation(glsl_program_num, "tex"), 0); // Bind the 2D sampler.
check_error();
// Draw the texture stretched over a long quad, interpolating it out.
// Note that since the texel center is in (0.5), we need to adjust the
// texture coordinates in order not to get long stretches of (1,1,1,...)
// at the start and (...,0,0,0) at the end.
- glBegin(GL_QUADS);
-
- glTexCoord1f(0.25f);
- glVertex2f(0.0f, 0.0f);
-
- glTexCoord1f(0.75f);
- glVertex2f(1.0f, 0.0f);
+ float vertices[] = {
+ 0.0f, 1.0f,
+ 0.0f, 0.0f,
+ 1.0f, 1.0f,
+ 1.0f, 0.0f
+ };
+ float texcoords[] = {
+ 0.25f, 0.0f,
+ 0.25f, 0.0f,
+ 0.75f, 0.0f,
+ 0.75f, 0.0f
+ };
- glTexCoord1f(0.75f);
- glVertex2f(1.0f, 1.0f);
+ GLuint vao;
+ glGenVertexArrays(1, &vao);
+ check_error();
+ glBindVertexArray(vao);
+ check_error();
- glTexCoord1f(0.25f);
- glVertex2f(0.0f, 1.0f);
+ GLuint position_vbo = fill_vertex_attribute(glsl_program_num, "position", 2, GL_FLOAT, sizeof(vertices), vertices);
+ GLuint texcoord_vbo = fill_vertex_attribute(glsl_program_num, "texcoord", 2, GL_FLOAT, sizeof(texcoords), texcoords);
- glEnd();
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
check_error();
- glDisable(GL_TEXTURE_1D);
+ cleanup_vertex_attribute(glsl_program_num, "position", position_vbo);
+ cleanup_vertex_attribute(glsl_program_num, "texcoord", texcoord_vbo);
+
+ glUseProgram(0);
check_error();
// Now read the data back and see what the card did.
biggest_jump = max(biggest_jump, out_data[i] - out_data[i - 1]);
}
+ assert(biggest_jump > 0.0);
movit_texel_subpixel_precision = biggest_jump;
// Clean up.
- glBindTexture(GL_TEXTURE_1D, 0);
+ glBindTexture(GL_TEXTURE_2D, 0);
check_error();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
check_error();
check_error();
glDeleteTextures(1, &src_texnum);
check_error();
+
+ resource_pool.release_glsl_program(glsl_program_num);
+ glDeleteVertexArrays(1, &vao);
+ check_error();
}
void measure_roundoff_problems()
{
+ ResourcePool resource_pool;
+
// Generate a destination texture to render to, and an FBO.
GLuint dst_texnum, fbo;
}
glGenTextures(1, &src_texnum);
check_error();
- glBindTexture(GL_TEXTURE_1D, src_texnum);
- check_error();
- glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glBindTexture(GL_TEXTURE_2D, src_texnum);
check_error();
- glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
check_error();
- glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE32F_ARB, 512, 0, GL_LUMINANCE, GL_FLOAT, texdata);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
check_error();
- glEnable(GL_TEXTURE_1D);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_R32F, 512, 1, 0, GL_RED, GL_FLOAT, texdata);
check_error();
// Basic state.
glViewport(0, 0, 512, 1);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0);
-
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
+ GLuint glsl_program_num = resource_pool.compile_glsl_program(
+ read_file("vs.vert"), read_file("texture1d.frag"));
+ glUseProgram(glsl_program_num);
check_error();
+ glUniform1i(glGetUniformLocation(glsl_program_num, "tex"), 0); // Bind the 2D sampler.
// Draw the texture stretched over a long quad, interpolating it out.
- glBegin(GL_QUADS);
-
- glTexCoord1f(0.0f);
- glVertex2f(0.0f, 0.0f);
-
- glTexCoord1f(1.0f);
- glVertex2f(1.0f, 0.0f);
+ float vertices[] = {
+ 0.0f, 1.0f,
+ 0.0f, 0.0f,
+ 1.0f, 1.0f,
+ 1.0f, 0.0f
+ };
- glTexCoord1f(1.0f);
- glVertex2f(1.0f, 1.0f);
+ GLuint vao;
+ glGenVertexArrays(1, &vao);
+ check_error();
+ glBindVertexArray(vao);
+ check_error();
- glTexCoord1f(0.0f);
- glVertex2f(0.0f, 1.0f);
+ GLuint position_vbo = fill_vertex_attribute(glsl_program_num, "position", 2, GL_FLOAT, sizeof(vertices), vertices);
+ GLuint texcoord_vbo = fill_vertex_attribute(glsl_program_num, "texcoord", 2, GL_FLOAT, sizeof(vertices), vertices); // Same data.
- glEnd();
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
check_error();
- glDisable(GL_TEXTURE_1D);
+ cleanup_vertex_attribute(glsl_program_num, "position", position_vbo);
+ cleanup_vertex_attribute(glsl_program_num, "texcoord", texcoord_vbo);
+
+ glUseProgram(0);
check_error();
// Now read the data back and see what the card did. (Ignore the last value.)
movit_num_wrongly_rounded = wrongly_rounded;
// Clean up.
- glBindTexture(GL_TEXTURE_1D, 0);
+ glBindTexture(GL_TEXTURE_2D, 0);
check_error();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
check_error();
check_error();
glDeleteTextures(1, &src_texnum);
check_error();
+
+ resource_pool.release_glsl_program(glsl_program_num);
+ glDeleteVertexArrays(1, &vao);
+ check_error();
}
bool check_extensions()
projects / movit / blobdiff