brl/mutter
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Dynamically load the GL or GLES library

Browse Source 
The GL or GLES library is now dynamically loaded by the CoglRenderer
so that it can choose between GL, GLES1 and GLES2 at runtime. The
library is loaded by the renderer because it needs to be done before
calling eglInitialize. There is a new environment variable called
COGL_DRIVER to choose between gl, gles1 or gles2.

The #ifdefs for HAVE_COGL_GL, HAVE_COGL_GLES and HAVE_COGL_GLES2 have
been changed so that they don't assume the ifdefs are mutually
exclusive. They haven't been removed entirely so that it's possible to
compile the GLES backends without the the enums from the GL headers.

When using GLX the winsys additionally dynamically loads libGL because
that also contains the GLX API. It can't be linked in directly because
that would probably conflict with the GLES API if the EGL is
selected. When compiling with EGL support the library links directly
to libEGL because it doesn't contain any GL API so it shouldn't have
any conflicts.

When building for WGL or OSX Cogl still directly links against the GL
API so there is a #define in config.h so that Cogl won't try to dlopen
the library.

Cogl-pango previously had a #ifdef to detect when the GL backend is
used so that it can sneakily pass GL_QUADS to
cogl_vertex_buffer_draw. This is now changed so that it queries the
CoglContext for the backend. However to get this to work Cogl now
needs to export the _cogl_context_get_default symbol and cogl-pango
needs some extra -I flags to so that it can include
cogl-context-private.h
This commit is contained in:
Neil Roberts
2011-07-07 20:44:56 +01:00
parent 5f181973a6
commit b2e735ff7f
48 changed files with 1556 additions and 1110 deletions
Download Patch File Download Diff File Expand all files Collapse all files

292
cogl/cogl-pipeline-opengl.c
View File

@ -240,12 +240,6 @@ _cogl_pipeline_texture_storage_change_notify (CoglHandle texture)
static void
set_glsl_program (GLuint gl_program)
{
#ifdef HAVE_COGL_GLES
g_return_if_reached ();
#else /* HAVE_COGL_GLES */
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (ctx->current_gl_program != gl_program)
@ -263,8 +257,6 @@ set_glsl_program (GLuint gl_program)
ctx->current_gl_program = 0;
}
}
#endif /* HAVE_COGL_GLES */
}
void
@ -415,7 +407,7 @@ _cogl_get_max_texture_image_units (void)
}
#endif
#ifndef HAVE_COGL_GLES
#if defined(HAVE_COGL_GLES2) || defined(HAVE_COGL_GL)
static gboolean
blend_factor_uses_constant (GLenum blend_factor)
@ -446,21 +438,20 @@ flush_depth_state (CoglDepthState *depth_state)
ctx->depth_writing_enabled_cache = depth_state->write_enabled;
}
#ifndef COGL_HAS_GLES
if (ctx->depth_range_near_cache != depth_state->range_near ||
ctx->depth_range_far_cache != depth_state->range_far)
if (ctx->driver != COGL_DRIVER_GLES1 &&
(ctx->depth_range_near_cache != depth_state->range_near ||
ctx->depth_range_far_cache != depth_state->range_far))
{
#ifdef COGL_HAS_GLES2
GE (ctx, glDepthRangef (depth_state->range_near,
depth_state->range_far));
#else
GE (ctx, glDepthRange (depth_state->range_near,
depth_state->range_far));
#endif
if (ctx->driver == COGL_DRIVER_GLES2)
GE (ctx, glDepthRangef (depth_state->range_near,
depth_state->range_far));
else
GE (ctx, glDepthRange (depth_state->range_near,
depth_state->range_far));
ctx->depth_range_near_cache = depth_state->range_near;
ctx->depth_range_far_cache = depth_state->range_far;
}
#endif /* COGL_HAS_GLES */
}
static void
@ -472,8 +463,8 @@ _cogl_pipeline_flush_color_blend_alpha_depth_state (
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* On GLES2 we'll flush the color later */
#ifndef HAVE_COGL_GLES2
if (!skip_gl_color)
if (ctx->driver != COGL_DRIVER_GLES2 &&
!skip_gl_color)
{
if ((pipelines_difference & COGL_PIPELINE_STATE_COLOR) ||
/* Assume if we were previously told to skip the color, then
@ -488,7 +479,6 @@ _cogl_pipeline_flush_color_blend_alpha_depth_state (
cogl_color_get_alpha_byte (&authority->color)));
}
}
#endif
if (pipelines_difference & COGL_PIPELINE_STATE_BLEND)
{
@ -497,97 +487,103 @@ _cogl_pipeline_flush_color_blend_alpha_depth_state (
CoglPipelineBlendState *blend_state =
&authority->big_state->blend_state;
#if defined (HAVE_COGL_GLES2)
gboolean have_blend_equation_seperate = TRUE;
gboolean have_blend_func_separate = TRUE;
#elif defined (HAVE_COGL_GL)
gboolean have_blend_equation_seperate = FALSE;
gboolean have_blend_func_separate = FALSE;
if (ctx->glBlendEquationSeparate) /* Only GL 2.0 + */
have_blend_equation_seperate = TRUE;
if (ctx->glBlendFuncSeparate) /* Only GL 1.4 + */
have_blend_func_separate = TRUE;
#endif
#ifndef HAVE_COGL_GLES /* GLES 1 only has glBlendFunc */
if (blend_factor_uses_constant (blend_state->blend_src_factor_rgb) ||
blend_factor_uses_constant (blend_state->blend_src_factor_alpha) ||
blend_factor_uses_constant (blend_state->blend_dst_factor_rgb) ||
blend_factor_uses_constant (blend_state->blend_dst_factor_alpha))
/* GLES 1 only has glBlendFunc */
if (ctx->driver == COGL_DRIVER_GLES1)
{
float red =
cogl_color_get_red_float (&blend_state->blend_constant);
float green =
cogl_color_get_green_float (&blend_state->blend_constant);
float blue =
cogl_color_get_blue_float (&blend_state->blend_constant);
float alpha =
cogl_color_get_alpha_float (&blend_state->blend_constant);
GE (ctx, glBlendFunc (blend_state->blend_src_factor_rgb,
blend_state->blend_dst_factor_rgb));
}
#if defined(HAVE_COGL_GLES2) || defined(HAVE_COGL_GL)
else
{
if (blend_factor_uses_constant (blend_state->blend_src_factor_rgb) ||
blend_factor_uses_constant (blend_state
->blend_src_factor_alpha) ||
blend_factor_uses_constant (blend_state->blend_dst_factor_rgb) ||
blend_factor_uses_constant (blend_state->blend_dst_factor_alpha))
{
float red =
cogl_color_get_red_float (&blend_state->blend_constant);
float green =
cogl_color_get_green_float (&blend_state->blend_constant);
float blue =
cogl_color_get_blue_float (&blend_state->blend_constant);
float alpha =
cogl_color_get_alpha_float (&blend_state->blend_constant);
GE (ctx, glBlendColor (red, green, blue, alpha));
GE (ctx, glBlendColor (red, green, blue, alpha));
}
if (ctx->glBlendEquationSeparate &&
blend_state->blend_equation_rgb !=
blend_state->blend_equation_alpha)
GE (ctx,
glBlendEquationSeparate (blend_state->blend_equation_rgb,
blend_state->blend_equation_alpha));
else
GE (ctx, glBlendEquation (blend_state->blend_equation_rgb));
if (ctx->glBlendFuncSeparate &&
(blend_state->blend_src_factor_rgb !=
blend_state->blend_src_factor_alpha ||
(blend_state->blend_src_factor_rgb !=
blend_state->blend_src_factor_alpha)))
GE (ctx, glBlendFuncSeparate (blend_state->blend_src_factor_rgb,
blend_state->blend_dst_factor_rgb,
blend_state->blend_src_factor_alpha,
blend_state->blend_dst_factor_alpha));
else
GE (ctx, glBlendFunc (blend_state->blend_src_factor_rgb,
blend_state->blend_dst_factor_rgb));
}
#endif
}
#if defined (HAVE_COGL_GL) || defined (HAVE_COGL_GLES)
if (ctx->driver != COGL_DRIVER_GLES2)
{
/* Under GLES2 the alpha function is implemented as part of the
fragment shader */
if (pipelines_difference & (COGL_PIPELINE_STATE_ALPHA_FUNC |
COGL_PIPELINE_STATE_ALPHA_FUNC_REFERENCE))
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline,
COGL_PIPELINE_STATE_ALPHA_FUNC);
CoglPipelineAlphaFuncState *alpha_state =
&authority->big_state->alpha_state;
/* NB: Currently the Cogl defines are compatible with the GL ones: */
GE (ctx, glAlphaFunc (alpha_state->alpha_func,
alpha_state->alpha_func_reference));
}
if (have_blend_equation_seperate &&
blend_state->blend_equation_rgb != blend_state->blend_equation_alpha)
GE (ctx, glBlendEquationSeparate (blend_state->blend_equation_rgb,
blend_state->blend_equation_alpha));
else
GE (ctx, glBlendEquation (blend_state->blend_equation_rgb));
/* Under GLES2 the lighting parameters are implemented as uniforms
in the progend */
if (pipelines_difference & COGL_PIPELINE_STATE_LIGHTING)
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline,
COGL_PIPELINE_STATE_LIGHTING);
CoglPipelineLightingState *lighting_state =
&authority->big_state->lighting_state;
GE (ctx, glMaterialfv (GL_FRONT_AND_BACK, GL_AMBIENT,
lighting_state->ambient));
GE (ctx, glMaterialfv (GL_FRONT_AND_BACK, GL_DIFFUSE,
lighting_state->diffuse));
GE (ctx, glMaterialfv (GL_FRONT_AND_BACK, GL_SPECULAR,
lighting_state->specular));
GE (ctx, glMaterialfv (GL_FRONT_AND_BACK, GL_EMISSION,
lighting_state->emission));
GE (ctx, glMaterialfv (GL_FRONT_AND_BACK, GL_SHININESS,
&lighting_state->shininess));
}
}
if (have_blend_func_separate &&
(blend_state->blend_src_factor_rgb != blend_state->blend_src_factor_alpha ||
(blend_state->blend_src_factor_rgb !=
blend_state->blend_src_factor_alpha)))
GE (ctx, glBlendFuncSeparate (blend_state->blend_src_factor_rgb,
blend_state->blend_dst_factor_rgb,
blend_state->blend_src_factor_alpha,
blend_state->blend_dst_factor_alpha));
else
#endif
GE (ctx, glBlendFunc (blend_state->blend_src_factor_rgb,
blend_state->blend_dst_factor_rgb));
}
#ifndef HAVE_COGL_GLES2
/* Under GLES2 the alpha function is implemented as part of the
fragment shader */
if (pipelines_difference & (COGL_PIPELINE_STATE_ALPHA_FUNC |
COGL_PIPELINE_STATE_ALPHA_FUNC_REFERENCE))
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline, COGL_PIPELINE_STATE_ALPHA_FUNC);
CoglPipelineAlphaFuncState *alpha_state =
&authority->big_state->alpha_state;
/* NB: Currently the Cogl defines are compatible with the GL ones: */
GE (ctx, glAlphaFunc (alpha_state->alpha_func,
alpha_state->alpha_func_reference));
}
/* Under GLES2 the lighting parameters are implemented as uniforms
in the progend */
if (pipelines_difference & COGL_PIPELINE_STATE_LIGHTING)
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline, COGL_PIPELINE_STATE_LIGHTING);
CoglPipelineLightingState *lighting_state =
&authority->big_state->lighting_state;
GE (ctx, glMaterialfv (GL_FRONT_AND_BACK, GL_AMBIENT,
lighting_state->ambient));
GE (ctx, glMaterialfv (GL_FRONT_AND_BACK, GL_DIFFUSE,
lighting_state->diffuse));
GE (ctx, glMaterialfv (GL_FRONT_AND_BACK, GL_SPECULAR,
lighting_state->specular));
GE (ctx, glMaterialfv (GL_FRONT_AND_BACK, GL_EMISSION,
lighting_state->emission));
GE (ctx, glMaterialfv (GL_FRONT_AND_BACK, GL_SHININESS,
&lighting_state->shininess));
}
#endif /* HAVE_COGL_GLES2 */
if (pipelines_difference & COGL_PIPELINE_STATE_DEPTH)
{
@ -635,45 +631,54 @@ get_max_activateable_texture_units (void)
int i;
#ifdef HAVE_COGL_GL
/* GL_MAX_TEXTURE_COORDS is provided for both GLSL and ARBfp. It
defines the number of texture coordinates that can be
uploaded (but doesn't necessarily relate to how many texture
images can be sampled) */
if (cogl_features_available (COGL_FEATURE_SHADERS_GLSL) ||
cogl_features_available (COGL_FEATURE_SHADERS_ARBFP))
/* Previously this code subtracted the value by one but there
was no explanation for why it did this and it doesn't seem
to make sense so it has been removed */
GE (ctx, glGetIntegerv (GL_MAX_TEXTURE_COORDS, values + n_values++));
if (ctx->driver == COGL_DRIVER_GL)
{
/* GL_MAX_TEXTURE_COORDS is provided for both GLSL and ARBfp. It
defines the number of texture coordinates that can be
uploaded (but doesn't necessarily relate to how many texture
images can be sampled) */
if (cogl_features_available (COGL_FEATURE_SHADERS_GLSL) ||
cogl_features_available (COGL_FEATURE_SHADERS_ARBFP))
/* Previously this code subtracted the value by one but there
was no explanation for why it did this and it doesn't seem
to make sense so it has been removed */
GE (ctx, glGetIntegerv (GL_MAX_TEXTURE_COORDS,
values + n_values++));
/* GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS is defined for GLSL but
not ARBfp */
if (cogl_features_available (COGL_FEATURE_SHADERS_GLSL))
GE (ctx, glGetIntegerv (GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS,
values + n_values++));
/* GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS is defined for GLSL but
not ARBfp */
if (cogl_features_available (COGL_FEATURE_SHADERS_GLSL))
GE (ctx, glGetIntegerv (GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS,
values + n_values++));
}
#endif /* HAVE_COGL_GL */
#ifdef HAVE_COGL_GLES2
if (ctx->driver == COGL_DRIVER_GLES2)
{
GE (ctx, glGetIntegerv (GL_MAX_VERTEX_ATTRIBS, values + n_values));
/* Two of the vertex attribs need to be used for the position
and color */
values[n_values++] -= 2;
GE (ctx, glGetIntegerv (GL_MAX_VERTEX_ATTRIBS, values + n_values));
/* Two of the vertex attribs need to be used for the position
and color */
values[n_values++] -= 2;
GE (ctx, glGetIntegerv (GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS,
values + n_values++));
}
#endif
GE (ctx, glGetIntegerv (GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS,
values + n_values++));
#if defined (HAVE_COGL_GL) || defined (HAVE_COGL_GLES) /* not GLES2 */
if (ctx->driver != COGL_DRIVER_GLES2)
{
/* GL_MAX_TEXTURE_UNITS defines the number of units that are
usable from the fixed function pipeline, therefore it isn't
available in GLES2. These are also tied to the number of
texture coordinates that can be uploaded so it should be less
than that available from the shader extensions */
GE (ctx, glGetIntegerv (GL_MAX_TEXTURE_UNITS,
values + n_values++));
#else /* HAVE_COGL_GLES2 */
/* GL_MAX_TEXTURE_UNITS defines the number of units that are
usable from the fixed function pipeline, therefore it isn't
available in GLES2. These are also tied to the number of
texture coordinates that can be uploaded so it should be less
than that available from the shader extensions */
GE (ctx, glGetIntegerv (GL_MAX_TEXTURE_UNITS,
values + n_values++));
#endif /* HAVE_COGL_GLES2 */
}
#endif
g_assert (n_values <= G_N_ELEMENTS (values) &&
n_values > 0);
@ -786,8 +791,9 @@ flush_layers_common_gl_state_cb (CoglPipelineLayer *layer, void *user_data)
/* Under GLES2 the fragment shader will use gl_PointCoord instead of
replacing the texture coordinates */
#ifndef HAVE_COGL_GLES2
if (layers_difference & COGL_PIPELINE_LAYER_STATE_POINT_SPRITE_COORDS)
#if defined (HAVE_COGL_GLES) || defined (HAVE_COGL_GL)
if (ctx->driver != COGL_DRIVER_GLES2 &&
(layers_difference & COGL_PIPELINE_LAYER_STATE_POINT_SPRITE_COORDS))
{
CoglPipelineState change = COGL_PIPELINE_LAYER_STATE_POINT_SPRITE_COORDS;
CoglPipelineLayer *authority =
@ -799,7 +805,7 @@ flush_layers_common_gl_state_cb (CoglPipelineLayer *layer, void *user_data)
GE (ctx, glTexEnvi (GL_POINT_SPRITE, GL_COORD_REPLACE,
big_state->point_sprite_coords));
}
#endif /* HAVE_COGL_GLES2 */
#endif
cogl_handle_ref (layer);
if (unit->layer != COGL_INVALID_HANDLE)
@ -1299,7 +1305,7 @@ done:
of the program object so they could be overridden by any
attribute changes in another program */
#ifdef HAVE_COGL_GLES2
if (!skip_gl_color)
if (ctx->driver == COGL_DRIVER_GLES2 && !skip_gl_color)
{
int attribute;
CoglPipeline *authority =