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cogl: Bump minimum GL version to 2.1

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We already effectively require GLSL, because there's no fixed-function
backend anymore. OpenGL 2.0 drivers don't really exist in the wild, so
just go ahead and require 2.1 or better. 2.1 implies GLSL 1.20 or
better, so simplify that as well.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/489
This commit is contained in:
Adam Jackson 2019-03-08 11:06:37 -05:00 committed by Georges Basile Stavracas Neto
parent a94841abf1
commit 191c31b0f0
1 changed files with 31 additions and 124 deletions
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155
cogl/cogl/driver/gl/gl/cogl-driver-gl.c
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@ -317,31 +317,13 @@ check_gl_version (CoglContext *ctx,
return FALSE;
}
/* GL 1.3 supports all of the required functionality in core */
if (COGL_CHECK_GL_VERSION (major, minor, 1, 3))
return TRUE;
/* OpenGL 1.2 is only supported if we have the multitexturing
extension */
if (!_cogl_check_extension ("GL_ARB_multitexture", gl_extensions))
/* We require GLSL 1.20, which is implied by OpenGL 2.1. */
if (!COGL_CHECK_GL_VERSION (major, minor, 2, 1))
{
_cogl_set_error (error,
COGL_DRIVER_ERROR,
COGL_DRIVER_ERROR_INVALID_VERSION,
"The OpenGL driver is missing "
"the GL_ARB_multitexture extension");
return FALSE;
}
/* OpenGL 1.2 is required */
if (!COGL_CHECK_GL_VERSION (major, minor, 1, 2))
{
_cogl_set_error (error,
COGL_DRIVER_ERROR,
COGL_DRIVER_ERROR_INVALID_VERSION,
"The OpenGL version of your driver (%i.%i) "
"is not compatible with Cogl",
major, minor);
COGL_DRIVER_ERROR,
COGL_DRIVER_ERROR_INVALID_VERSION,
"OpenGL 2.1 or better is required");
return FALSE;
}
@ -356,6 +338,7 @@ _cogl_driver_update_features (CoglContext *ctx,
unsigned long private_features
[COGL_FLAGS_N_LONGS_FOR_SIZE (COGL_N_PRIVATE_FEATURES)] = { 0 };
char **gl_extensions;
const char *glsl_version;
int gl_major = 0, gl_minor = 0;
int i;
@ -403,23 +386,13 @@ _cogl_driver_update_features (CoglContext *ctx,
_cogl_gpu_info_init (ctx, &ctx->gpu);
ctx->glsl_major = 1;
ctx->glsl_minor = 1;
ctx->glsl_minor = 2;
ctx->glsl_version_to_use = 120;
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 0))
{
const char *glsl_version =
(char *)ctx->glGetString (GL_SHADING_LANGUAGE_VERSION);
_cogl_gl_util_parse_gl_version (glsl_version,
&ctx->glsl_major,
&ctx->glsl_minor);
}
if (COGL_CHECK_GL_VERSION (ctx->glsl_major, ctx->glsl_minor, 1, 2))
/* We want to use version 120 if it is available so that the
* gl_PointCoord can be used. */
ctx->glsl_version_to_use = 120;
else
ctx->glsl_version_to_use = 110;
glsl_version = (char *)ctx->glGetString (GL_SHADING_LANGUAGE_VERSION);
_cogl_gl_util_parse_gl_version (glsl_version,
&ctx->glsl_major,
&ctx->glsl_minor);
flags = (COGL_FEATURE_TEXTURE_READ_PIXELS
| COGL_FEATURE_UNSIGNED_INT_INDICES
@ -427,30 +400,21 @@ _cogl_driver_update_features (CoglContext *ctx,
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_UNSIGNED_INT_INDICES, TRUE);
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_DEPTH_RANGE, TRUE);
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 1, 4))
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_MIRRORED_REPEAT, TRUE);
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_MIRRORED_REPEAT, TRUE);
_cogl_feature_check_ext_functions (ctx,
gl_major,
gl_minor,
gl_extensions);
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 0) ||
_cogl_check_extension ("GL_ARB_texture_non_power_of_two", gl_extensions))
{
flags |= COGL_FEATURE_TEXTURE_NPOT
| COGL_FEATURE_TEXTURE_NPOT_BASIC
| COGL_FEATURE_TEXTURE_NPOT_MIPMAP
| COGL_FEATURE_TEXTURE_NPOT_REPEAT;
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_TEXTURE_NPOT, TRUE);
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, TRUE);
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_TEXTURE_NPOT_REPEAT, TRUE);
}
flags |= COGL_FEATURE_TEXTURE_NPOT
| COGL_FEATURE_TEXTURE_NPOT_BASIC
| COGL_FEATURE_TEXTURE_NPOT_MIPMAP
| COGL_FEATURE_TEXTURE_NPOT_REPEAT;
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_TEXTURE_NPOT, TRUE);
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, TRUE);
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_TEXTURE_NPOT_REPEAT, TRUE);
if (_cogl_check_extension ("GL_MESA_pack_invert", gl_extensions))
COGL_FLAGS_SET (private_features,
@ -483,64 +447,15 @@ _cogl_driver_update_features (CoglContext *ctx,
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_DEPTH_TEXTURE, TRUE);
}
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 1) ||
_cogl_check_extension ("GL_EXT_pixel_buffer_object", gl_extensions))
COGL_FLAGS_SET (private_features, COGL_PRIVATE_FEATURE_PBOS, TRUE);
COGL_FLAGS_SET (private_features, COGL_PRIVATE_FEATURE_PBOS, TRUE);
COGL_FLAGS_SET (private_features,
COGL_PRIVATE_FEATURE_BLEND_CONSTANT, TRUE);
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 1, 4) ||
_cogl_check_extension ("GL_EXT_blend_color", gl_extensions))
COGL_FLAGS_SET (private_features,
COGL_PRIVATE_FEATURE_BLEND_CONSTANT, TRUE);
flags |= COGL_FEATURE_SHADERS_GLSL;
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_GLSL, TRUE);
if (ctx->glCreateProgram)
{
flags |= COGL_FEATURE_SHADERS_GLSL;
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_GLSL, TRUE);
}
else
{
/* If all of the old GLSL extensions are available then we can fake
* the GL 2.0 GLSL support by diverting to the old function names */
if (ctx->glCreateProgramObject && /* GL_ARB_shader_objects */
ctx->glVertexAttribPointer && /* GL_ARB_vertex_shader */
_cogl_check_extension ("GL_ARB_fragment_shader", gl_extensions))
{
ctx->glCreateShader = ctx->glCreateShaderObject;
ctx->glCreateProgram = ctx->glCreateProgramObject;
ctx->glDeleteShader = ctx->glDeleteObject;
ctx->glDeleteProgram = ctx->glDeleteObject;
ctx->glAttachShader = ctx->glAttachObject;
ctx->glUseProgram = ctx->glUseProgramObject;
ctx->glGetProgramInfoLog = ctx->glGetInfoLog;
ctx->glGetShaderInfoLog = ctx->glGetInfoLog;
ctx->glGetShaderiv = ctx->glGetObjectParameteriv;
ctx->glGetProgramiv = ctx->glGetObjectParameteriv;
ctx->glDetachShader = ctx->glDetachObject;
ctx->glGetAttachedShaders = ctx->glGetAttachedObjects;
/* FIXME: there doesn't seem to be an equivalent for glIsShader
* and glIsProgram. This doesn't matter for now because Cogl
* doesn't use these but if we add support for simulating a
* GLES2 context on top of regular GL then we'll need to do
* something here */
flags |= COGL_FEATURE_SHADERS_GLSL;
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_GLSL, TRUE);
}
}
if ((COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 0) ||
_cogl_check_extension ("GL_ARB_point_sprite", gl_extensions)) &&
/* If GLSL is supported then we only enable point sprite support
* too if we have glsl >= 1.2 otherwise we don't have the
* gl_PointCoord builtin which we depend on in the glsl backend.
*/
(!COGL_FLAGS_GET (ctx->features, COGL_FEATURE_ID_GLSL) ||
COGL_CHECK_GL_VERSION (ctx->glsl_major, ctx->glsl_minor, 1, 2)))
{
flags |= COGL_FEATURE_POINT_SPRITE;
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_POINT_SPRITE, TRUE);
}
flags |= COGL_FEATURE_POINT_SPRITE;
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_POINT_SPRITE, TRUE);
if (ctx->glGenBuffers)
{
@ -584,17 +499,9 @@ _cogl_driver_update_features (CoglContext *ctx,
COGL_FLAGS_SET (private_features,
COGL_PRIVATE_FEATURE_TEXTURE_SWIZZLE, TRUE);
/* The per-vertex point size is only available via GLSL with the
* gl_PointSize builtin. This is only available in GL 2.0 (not the
* GLSL extensions) */
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 0))
{
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_PER_VERTEX_POINT_SIZE,
TRUE);
COGL_FLAGS_SET (private_features,
COGL_PRIVATE_FEATURE_ENABLE_PROGRAM_POINT_SIZE, TRUE);
}
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_PER_VERTEX_POINT_SIZE, TRUE);
COGL_FLAGS_SET (private_features,
COGL_PRIVATE_FEATURE_ENABLE_PROGRAM_POINT_SIZE, TRUE);
if (ctx->driver == COGL_DRIVER_GL)
{