#include <string>
#include "init.h"
+#include "resource_pool.h"
#include "util.h"
using namespace std;
+namespace movit {
+
bool movit_initialized = false;
MovitDebugLevel movit_debug_level = MOVIT_DEBUG_ON;
float movit_texel_subpixel_precision;
bool movit_srgb_textures_supported;
int movit_num_wrongly_rounded;
+bool movit_shader_rounding_supported;
// The rules for objects with nontrivial constructors in static scope
// are somewhat convoluted, and easy to mess up. We simply have a
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();
glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 2, 0, GL_LUMINANCE, GL_FLOAT, texdata);
check_error();
- glEnable(GL_TEXTURE_1D);
- check_error();
// Basic state.
glDisable(GL_BLEND);
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 1D 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);
+ float vertices[] = {
+ 0.0f, 0.0f,
+ 1.0f, 0.0f,
+ 1.0f, 1.0f,
+ 0.0f, 1.0f
+ };
+ float texcoords[] = {
+ 0.25f, 0.0f,
+ 0.75f, 0.0f,
+ 0.75f, 0.0f,
+ 0.25f, 0.0f
+ };
- glTexCoord1f(0.25f);
- glVertex2f(0.0f, 0.0f);
-
- glTexCoord1f(0.75f);
- glVertex2f(1.0f, 0.0f);
-
- glTexCoord1f(0.75f);
- glVertex2f(1.0f, 1.0f);
-
- glTexCoord1f(0.25f);
- glVertex2f(0.0f, 1.0f);
+ int position_attrib = glGetAttribLocation(glsl_program_num, "position");
+ assert(position_attrib != -1);
+ int texcoord_attrib = glGetAttribLocation(glsl_program_num, "texcoord");
+ assert(texcoord_attrib != -1);
+ glEnableVertexAttribArray(position_attrib);
+ check_error();
+ glVertexAttribPointer(position_attrib, 2, GL_FLOAT, GL_FALSE, 0, vertices);
+ check_error();
+ glEnableVertexAttribArray(texcoord_attrib);
+ check_error();
+ glVertexAttribPointer(texcoord_attrib, 2, GL_FLOAT, GL_FALSE, 0, texcoords);
+ check_error();
- glEnd();
+ glDrawArrays(GL_QUADS, 0, 4);
check_error();
- glDisable(GL_TEXTURE_1D);
+ glUseProgram(0);
+ check_error();
+ glDisableVertexAttribArray(position_attrib);
+ check_error();
+ glDisableVertexAttribArray(texcoord_attrib);
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.
check_error();
glDeleteTextures(1, &src_texnum);
check_error();
+
+ resource_pool.release_glsl_program(glsl_program_num);
}
void measure_roundoff_problems()
{
+ ResourcePool resource_pool;
+
// Generate a destination texture to render to, and an FBO.
GLuint dst_texnum, fbo;
check_error();
glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE32F_ARB, 512, 0, GL_LUMINANCE, GL_FLOAT, texdata);
check_error();
- glEnable(GL_TEXTURE_1D);
- check_error();
// Basic state.
glDisable(GL_BLEND);
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 1D 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);
-
- glTexCoord1f(1.0f);
- glVertex2f(1.0f, 1.0f);
-
- glTexCoord1f(0.0f);
- glVertex2f(0.0f, 1.0f);
-
- glEnd();
+ float vertices[] = {
+ 0.0f, 0.0f,
+ 1.0f, 0.0f,
+ 1.0f, 1.0f,
+ 0.0f, 1.0f
+ };
+ float texcoords[] = {
+ 0.25f, 0.0f,
+ 0.75f, 0.0f,
+ 0.75f, 0.0f,
+ 0.25f, 0.0f
+ };
+ int position_attrib = glGetAttribLocation(glsl_program_num, "position");
+ assert(position_attrib != -1);
+ int texcoord_attrib = glGetAttribLocation(glsl_program_num, "texcoord");
+ assert(texcoord_attrib != -1);
+ glEnableVertexAttribArray(position_attrib);
+ check_error();
+ glVertexAttribPointer(position_attrib, 2, GL_FLOAT, GL_FALSE, 0, vertices);
+ check_error();
+ glEnableVertexAttribArray(texcoord_attrib);
check_error();
+ glVertexAttribPointer(texcoord_attrib, 2, GL_FLOAT, GL_FALSE, 0, texcoords);
+ check_error();
+ glDrawArrays(GL_QUADS, 0, 4);
- glDisable(GL_TEXTURE_1D);
+ glUseProgram(0);
+ check_error();
+ glDisableVertexAttribArray(position_attrib);
check_error();
+ glDisableVertexAttribArray(texcoord_attrib);
// Now read the data back and see what the card did. (Ignore the last value.)
// (We only look at the red channel; the others will surely be the same.)
check_error();
glDeleteTextures(1, &src_texnum);
check_error();
+
+ resource_pool.release_glsl_program(glsl_program_num);
}
-void check_extensions()
+bool check_extensions()
{
// We fundamentally need FBOs and floating-point textures.
- assert(glewIsSupported("GL_ARB_framebuffer_object") != 0);
- assert(glewIsSupported("GL_ARB_texture_float") != 0);
+ if (!glewIsSupported("GL_ARB_framebuffer_object")) return false;
+ if (!glewIsSupported("GL_ARB_texture_float")) return false;
// We assume that we can use non-power-of-two textures without restrictions.
- assert(glewIsSupported("GL_ARB_texture_non_power_of_two") != 0);
+ if (!glewIsSupported("GL_ARB_texture_non_power_of_two")) return false;
// We also need GLSL fragment shaders.
- assert(glewIsSupported("GL_ARB_fragment_shader") != 0);
- assert(glewIsSupported("GL_ARB_shading_language_100") != 0);
+ if (!glewIsSupported("GL_ARB_fragment_shader")) return false;
+ if (!glewIsSupported("GL_ARB_shading_language_100")) return false;
// FlatInput and YCbCrInput uses PBOs. (They could in theory do without,
// but no modern card would really not provide it.)
- assert(glewIsSupported("GL_ARB_pixel_buffer_object") != 0);
+ if (!glewIsSupported("GL_ARB_pixel_buffer_object")) return false;
// ResampleEffect uses RG textures to encode a two-component LUT.
- assert(glewIsSupported("GL_ARB_texture_rg") != 0);
+ if (!glewIsSupported("GL_ARB_texture_rg")) return false;
// sRGB texture decode would be nice, but are not mandatory
// (GammaExpansionEffect can do the same thing if needed).
movit_srgb_textures_supported = glewIsSupported("GL_EXT_texture_sRGB");
+
+ // We may want to use round() at the end of the final shader,
+ // if supported. We need either GLSL 1.30 or this extension to do that,
+ // and 1.30 brings with it other things that we don't want to demand
+ // for now.
+ movit_shader_rounding_supported = glewIsSupported("GL_EXT_gpu_shader4");
+
+ return true;
}
} // namespace
-void init_movit(const string& data_directory, MovitDebugLevel debug_level)
+bool init_movit(const string& data_directory, MovitDebugLevel debug_level)
{
if (movit_initialized) {
- return;
+ return true;
}
movit_data_directory = new string(data_directory);
movit_debug_level = debug_level;
- glewInit();
+ GLenum err = glewInit();
+ if (err != GLEW_OK) {
+ return false;
+ }
// geez
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glDisable(GL_DITHER);
+ if (!check_extensions()) {
+ return false;
+ }
measure_texel_subpixel_precision();
measure_roundoff_problems();
- check_extensions();
movit_initialized = true;
+ return true;
}
+
+} // namespace movit
projects / movit / blobdiff