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7f1c8bb)
Several extensions have been accepted over the years into the core OpenGL
spec, and occasionally, we might see a situation where something implements
the core spec but _not_ the extension. In particular, some extensions seem
to disappear when we ask Mesa for an OpenGL 3.1 forward-compatible context.
bool check_extensions()
{
// We fundamentally need FBOs and floating-point textures.
bool check_extensions()
{
// We fundamentally need FBOs and floating-point textures.
- if (!epoxy_has_gl_extension("GL_ARB_framebuffer_object")) return false;
- if (!epoxy_has_gl_extension("GL_ARB_texture_float")) return false;
+ // 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.
// We assume that we can use non-power-of-two textures without restrictions.
- if (!epoxy_has_gl_extension("GL_ARB_texture_non_power_of_two")) return false;
+ if (epoxy_gl_version() < 20 &&
+ !epoxy_has_gl_extension("GL_ARB_texture_non_power_of_two")) return false;
// We also need GLSL fragment shaders.
// We also need GLSL fragment shaders.
- if (!epoxy_has_gl_extension("GL_ARB_fragment_shader")) return false;
- if (!epoxy_has_gl_extension("GL_ARB_shading_language_100")) return false;
+ 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;
+ }
// FlatInput and YCbCrInput uses PBOs. (They could in theory do without,
// but no modern card would really not provide it.)
// FlatInput and YCbCrInput uses PBOs. (They could in theory do without,
// but no modern card would really not provide it.)
- if (!epoxy_has_gl_extension("GL_ARB_pixel_buffer_object")) return false;
+ 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.
// ResampleEffect uses RG textures to encode a two-component LUT.
- if (!epoxy_has_gl_extension("GL_ARB_texture_rg")) return false;
+ if (epoxy_gl_version() < 30 &&
+ !epoxy_has_gl_extension("GL_ARB_texture_rg")) return false;
// sRGB texture decode would be nice, but are not mandatory
// (GammaExpansionEffect can do the same thing if needed).
// sRGB texture decode would be nice, but are not mandatory
// (GammaExpansionEffect can do the same thing if needed).
- movit_srgb_textures_supported = epoxy_has_gl_extension("GL_EXT_texture_sRGB");
+ movit_srgb_textures_supported =
+ (epoxy_gl_version() >= 21 || epoxy_has_gl_extension("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.
// 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 = epoxy_has_gl_extension("GL_EXT_gpu_shader4");
+ movit_shader_rounding_supported =
+ (epoxy_gl_version() >= 30 || epoxy_has_gl_extension("GL_EXT_gpu_shader4"));