MovitDebugLevel movit_debug_level = MOVIT_DEBUG_ON;
float movit_texel_subpixel_precision;
bool movit_srgb_textures_supported;
+bool movit_timer_queries_supported;
int movit_num_wrongly_rounded;
bool movit_shader_rounding_supported;
MovitShaderModel movit_shader_model;
check_error();
}
+struct RequiredExtension {
+ int min_equivalent_gl_version;
+ const char extension_name[64];
+};
+const RequiredExtension required_extensions[] = {
+ // We fundamentally need FBOs and floating-point textures.
+ // FBOs are covered by OpenGL 1.5, and are not an extension there.
+ // Floating-point textures are part of OpenGL 3.0 and newer.
+ { 15, "GL_ARB_framebuffer_object" },
+ { 30, "GL_ARB_texture_float" },
+
+ // We assume that we can use non-power-of-two textures without restrictions.
+ { 20, "GL_ARB_texture_non_power_of_two" },
+
+ // We also need GLSL fragment shaders.
+ { 20, "GL_ARB_fragment_shader" },
+ { 20, "GL_ARB_shading_language_100" },
+
+ // FlatInput and YCbCrInput uses PBOs. (They could in theory do without,
+ // but no modern card would really not provide it.)
+ { 21, "GL_ARB_pixel_buffer_object" },
+
+ // ResampleEffect uses RG textures to encode a two-component LUT.
+ // We also need GL_R several places, for single-channel input.
+ { 30, "GL_ARB_texture_rg" },
+};
+
bool check_extensions()
{
// GLES generally doesn't use extensions as actively as desktop OpenGL.
if (epoxy_gl_version() >= 30) {
movit_srgb_textures_supported = true;
movit_shader_rounding_supported = true;
+ return true;
} else {
+ fprintf(stderr, "Movit system requirements: GLES version %.1f is too old (GLES 3.0 needed).\n",
+ 0.1f * epoxy_gl_version());
+ fprintf(stderr, "Movit initialization failed.\n");
return false;
}
}
- // We fundamentally need FBOs and floating-point textures.
- // FBOs are covered by OpenGL 1.5, and are not an extension there.
- // Floating-point textures are part of OpenGL 3.0 and newer.
- if (epoxy_gl_version() < 15 &&
- !epoxy_has_gl_extension("GL_ARB_framebuffer_object")) return false;
- if (epoxy_gl_version() < 30 &&
- !epoxy_has_gl_extension("GL_ARB_texture_float")) return false;
-
- // We assume that we can use non-power-of-two textures without restrictions.
- if (epoxy_gl_version() < 20 &&
- !epoxy_has_gl_extension("GL_ARB_texture_non_power_of_two")) return false;
-
- // We also need GLSL fragment shaders.
- if (epoxy_gl_version() < 20) {
- if (!epoxy_has_gl_extension("GL_ARB_fragment_shader")) return false;
- if (!epoxy_has_gl_extension("GL_ARB_shading_language_100")) return false;
+ // Check all extensions, and output errors for the ones that we are missing.
+ bool all_ok = true;
+ int gl_version = epoxy_gl_version();
+
+ for (unsigned i = 0; i < sizeof(required_extensions) / sizeof(required_extensions[0]); ++i) {
+ if (gl_version < required_extensions[i].min_equivalent_gl_version &&
+ !epoxy_has_gl_extension(required_extensions[i].extension_name)) {
+ fprintf(stderr, "Movit system requirements: Needs extension '%s' or at least OpenGL version %.1f (has version %.1f)\n",
+ required_extensions[i].extension_name,
+ 0.1f * required_extensions[i].min_equivalent_gl_version,
+ 0.1f * gl_version);
+ all_ok = false;
+ }
}
- // FlatInput and YCbCrInput uses PBOs. (They could in theory do without,
- // but no modern card would really not provide it.)
- if (epoxy_gl_version() < 21 &&
- !epoxy_has_gl_extension("GL_ARB_pixel_buffer_object")) return false;
-
- // ResampleEffect uses RG textures to encode a two-component LUT.
- if (epoxy_gl_version() < 30 &&
- !epoxy_has_gl_extension("GL_ARB_texture_rg")) return false;
+ if (!all_ok) {
+ fprintf(stderr, "Movit initialization failed.\n");
+ return false;
+ }
// sRGB texture decode would be nice, but are not mandatory
// (GammaExpansionEffect can do the same thing if needed).
movit_shader_rounding_supported =
(epoxy_gl_version() >= 30 || epoxy_has_gl_extension("GL_EXT_gpu_shader4"));
+ // The user can specify that they want a timing report for each
+ // phase in an effect chain. However, that depends on this extension;
+ // without it, we do cannot even create the query objects.
+ movit_timer_queries_supported =
+ (epoxy_gl_version() >= 33 || epoxy_has_gl_extension("GL_ARB_timer_query"));
+
return true;
}
return glsl_version;
}
+void APIENTRY debug_callback(GLenum source,
+ GLenum type,
+ GLuint id,
+ GLenum severity,
+ GLsizei length,
+ const char *message,
+ const void *userParam)
+{
+ printf("Debug: %s\n", message);
+}
+
} // namespace
bool init_movit(const string& data_directory, MovitDebugLevel debug_level)
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glDisable(GL_DITHER);
+ // You can turn this on if you want detailed debug messages from the driver.
+ // You should probably also ask for a debug context (see gtest_sdl_main.cpp),
+ // or you might not get much data back.
+ // glDebugMessageCallbackARB(callback, NULL);
+ // glDebugMessageControlARB(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, 0, GL_TRUE);
+
if (!check_extensions()) {
return false;
}
// Find out what shader model we should compile for.
+ // We need at least 1.30, due to use of (among others) integers.
if (epoxy_is_desktop_gl()) {
- if (get_glsl_version() >= 1.30) {
+ if (get_glsl_version() < 1.30f) {
+ fprintf(stderr, "Movit system requirements: Needs at least GLSL version 1.30 (has version %.1f)\n",
+ get_glsl_version());
+ return false;
+ }
+ if (get_glsl_version() < 1.50f) {
movit_shader_model = MOVIT_GLSL_130;
} else {
- movit_shader_model = MOVIT_GLSL_110;
+ // Note: All of our 1.50 shaders are identical to our 1.30 shaders,
+ // but OS X does not support 1.30; only 1.10 (which we don't support
+ // anymore) and 1.50 (and then only with core contexts). So we keep
+ // a second set of shaders around whose only difference is the different
+ // #version declaration.
+ movit_shader_model = MOVIT_GLSL_150;
}
} else {
movit_shader_model = MOVIT_ESSL_300;