353ea5299b
We now prepend a set of defines to any given GLSL shader so that we can define builtin uniforms/attributes within the "cogl" namespace that we can use to provide compatibility across a range of the earlier versions of GLSL. This updates test-cogl-shader-glsl.c and test-shader.c so they no longer needs to special case GLES vs GL when splicing together its shaders as well as the blur, colorize and desaturate effects. To get a feel for the new, portable uniform/attribute names here are the defines for OpenGL vertex shaders: #define cogl_position_in gl_Vertex #define cogl_color_in gl_Color #define cogl_tex_coord_in gl_MultiTexCoord0 #define cogl_tex_coord0_in gl_MultiTexCoord0 #define cogl_tex_coord1_in gl_MultiTexCoord1 #define cogl_tex_coord2_in gl_MultiTexCoord2 #define cogl_tex_coord3_in gl_MultiTexCoord3 #define cogl_tex_coord4_in gl_MultiTexCoord4 #define cogl_tex_coord5_in gl_MultiTexCoord5 #define cogl_tex_coord6_in gl_MultiTexCoord6 #define cogl_tex_coord7_in gl_MultiTexCoord7 #define cogl_normal_in gl_Normal #define cogl_position_out gl_Position #define cogl_point_size_out gl_PointSize #define cogl_color_out gl_FrontColor #define cogl_tex_coord_out gl_TexCoord #define cogl_modelview_matrix gl_ModelViewMatrix #define cogl_modelview_projection_matrix gl_ModelViewProjectionMatrix #define cogl_projection_matrix gl_ProjectionMatrix #define cogl_texture_matrix gl_TextureMatrix And for fragment shaders we have: #define cogl_color_in gl_Color #define cogl_tex_coord_in gl_TexCoord #define cogl_color_out gl_FragColor #define cogl_depth_out gl_FragDepth #define cogl_front_facing gl_FrontFacing
263 lines
8.3 KiB
C
263 lines
8.3 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2008,2009,2010 Intel Corporation.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see
|
|
* <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
*
|
|
* Authors:
|
|
* Robert Bragg <robert@linux.intel.com>
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "cogl-pipeline-private.h"
|
|
#include "cogl-pipeline-opengl-private.h"
|
|
|
|
#ifdef COGL_PIPELINE_BACKEND_FIXED
|
|
|
|
#include "cogl.h"
|
|
#include "cogl-internal.h"
|
|
#include "cogl-context.h"
|
|
#include "cogl-handle.h"
|
|
|
|
#include "cogl-texture-private.h"
|
|
#include "cogl-blend-string.h"
|
|
#include "cogl-profile.h"
|
|
|
|
#include <glib.h>
|
|
#include <glib/gprintf.h>
|
|
#include <string.h>
|
|
|
|
#ifdef HAVE_COGL_GLES2
|
|
#include "../gles/cogl-gles2-wrapper.h"
|
|
#endif
|
|
|
|
const CoglPipelineBackend _cogl_pipeline_fixed_backend;
|
|
|
|
static int
|
|
_cogl_pipeline_backend_fixed_get_max_texture_units (void)
|
|
{
|
|
_COGL_GET_CONTEXT (ctx, 0);
|
|
|
|
/* This function is called quite often so we cache the value to
|
|
avoid too many GL calls */
|
|
if (ctx->max_texture_units == -1)
|
|
{
|
|
ctx->max_texture_units = 1;
|
|
GE (glGetIntegerv (GL_MAX_TEXTURE_UNITS,
|
|
&ctx->max_texture_units));
|
|
}
|
|
|
|
return ctx->max_texture_units;
|
|
}
|
|
|
|
static gboolean
|
|
_cogl_pipeline_backend_fixed_start (CoglPipeline *pipeline,
|
|
int n_layers,
|
|
unsigned long pipelines_difference,
|
|
int n_tex_coord_attribs)
|
|
{
|
|
_cogl_use_program (0, COGL_PIPELINE_PROGRAM_TYPE_FIXED);
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
_cogl_pipeline_backend_fixed_add_layer (CoglPipeline *pipeline,
|
|
CoglPipelineLayer *layer,
|
|
unsigned long layers_difference)
|
|
{
|
|
CoglTextureUnit *unit =
|
|
_cogl_get_texture_unit (_cogl_pipeline_layer_get_unit_index (layer));
|
|
int unit_index = unit->index;
|
|
int n_rgb_func_args;
|
|
int n_alpha_func_args;
|
|
|
|
_COGL_GET_CONTEXT (ctx, FALSE);
|
|
|
|
/* XXX: Beware that since we are changing the active texture unit we
|
|
* must make sure we don't call into other Cogl components that may
|
|
* temporarily bind texture objects to query/modify parameters since
|
|
* they will end up binding texture unit 1. See
|
|
* _cogl_bind_gl_texture_transient for more details.
|
|
*/
|
|
_cogl_set_active_texture_unit (unit_index);
|
|
|
|
if (layers_difference & COGL_PIPELINE_LAYER_STATE_COMBINE)
|
|
{
|
|
CoglPipelineLayer *authority =
|
|
_cogl_pipeline_layer_get_authority (layer,
|
|
COGL_PIPELINE_LAYER_STATE_COMBINE);
|
|
CoglPipelineLayerBigState *big_state = authority->big_state;
|
|
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE));
|
|
|
|
/* Set the combiner functions... */
|
|
GE (glTexEnvi (GL_TEXTURE_ENV,
|
|
GL_COMBINE_RGB,
|
|
big_state->texture_combine_rgb_func));
|
|
GE (glTexEnvi (GL_TEXTURE_ENV,
|
|
GL_COMBINE_ALPHA,
|
|
big_state->texture_combine_alpha_func));
|
|
|
|
/*
|
|
* Setup the function arguments...
|
|
*/
|
|
|
|
/* For the RGB components... */
|
|
n_rgb_func_args =
|
|
_cogl_get_n_args_for_combine_func (big_state->texture_combine_rgb_func);
|
|
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_SRC0_RGB,
|
|
big_state->texture_combine_rgb_src[0]));
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND0_RGB,
|
|
big_state->texture_combine_rgb_op[0]));
|
|
if (n_rgb_func_args > 1)
|
|
{
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_SRC1_RGB,
|
|
big_state->texture_combine_rgb_src[1]));
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND1_RGB,
|
|
big_state->texture_combine_rgb_op[1]));
|
|
}
|
|
if (n_rgb_func_args > 2)
|
|
{
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_SRC2_RGB,
|
|
big_state->texture_combine_rgb_src[2]));
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND2_RGB,
|
|
big_state->texture_combine_rgb_op[2]));
|
|
}
|
|
|
|
/* For the Alpha component */
|
|
n_alpha_func_args =
|
|
_cogl_get_n_args_for_combine_func (big_state->texture_combine_alpha_func);
|
|
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_SRC0_ALPHA,
|
|
big_state->texture_combine_alpha_src[0]));
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND0_ALPHA,
|
|
big_state->texture_combine_alpha_op[0]));
|
|
if (n_alpha_func_args > 1)
|
|
{
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_SRC1_ALPHA,
|
|
big_state->texture_combine_alpha_src[1]));
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND1_ALPHA,
|
|
big_state->texture_combine_alpha_op[1]));
|
|
}
|
|
if (n_alpha_func_args > 2)
|
|
{
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_SRC2_ALPHA,
|
|
big_state->texture_combine_alpha_src[2]));
|
|
GE (glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND2_ALPHA,
|
|
big_state->texture_combine_alpha_op[2]));
|
|
}
|
|
}
|
|
|
|
if (layers_difference & COGL_PIPELINE_LAYER_STATE_COMBINE)
|
|
{
|
|
CoglPipelineLayer *authority =
|
|
_cogl_pipeline_layer_get_authority (layer,
|
|
COGL_PIPELINE_LAYER_STATE_COMBINE);
|
|
CoglPipelineLayerBigState *big_state = authority->big_state;
|
|
|
|
GE (glTexEnvfv (GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR,
|
|
big_state->texture_combine_constant));
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
_cogl_pipeline_backend_fixed_end (CoglPipeline *pipeline,
|
|
unsigned long pipelines_difference)
|
|
{
|
|
if (pipelines_difference & COGL_PIPELINE_STATE_FOG)
|
|
{
|
|
CoglPipeline *authority =
|
|
_cogl_pipeline_get_authority (pipeline, COGL_PIPELINE_STATE_FOG);
|
|
CoglPipelineFogState *fog_state = &authority->big_state->fog_state;
|
|
|
|
if (fog_state->enabled)
|
|
{
|
|
GLfloat fogColor[4];
|
|
GLenum gl_mode = GL_LINEAR;
|
|
|
|
fogColor[0] = cogl_color_get_red_float (&fog_state->color);
|
|
fogColor[1] = cogl_color_get_green_float (&fog_state->color);
|
|
fogColor[2] = cogl_color_get_blue_float (&fog_state->color);
|
|
fogColor[3] = cogl_color_get_alpha_float (&fog_state->color);
|
|
|
|
GE (glEnable (GL_FOG));
|
|
|
|
GE (glFogfv (GL_FOG_COLOR, fogColor));
|
|
|
|
#if HAVE_COGL_GLES
|
|
switch (fog_state->mode)
|
|
{
|
|
case COGL_FOG_MODE_LINEAR:
|
|
gl_mode = GL_LINEAR;
|
|
break;
|
|
case COGL_FOG_MODE_EXPONENTIAL:
|
|
gl_mode = GL_EXP;
|
|
break;
|
|
case COGL_FOG_MODE_EXPONENTIAL_SQUARED:
|
|
gl_mode = GL_EXP2;
|
|
break;
|
|
}
|
|
#endif
|
|
/* TODO: support other modes for GLES2 */
|
|
|
|
/* NB: GLES doesn't have glFogi */
|
|
GE (glFogf (GL_FOG_MODE, gl_mode));
|
|
GE (glHint (GL_FOG_HINT, GL_NICEST));
|
|
|
|
GE (glFogf (GL_FOG_DENSITY, fog_state->density));
|
|
GE (glFogf (GL_FOG_START, fog_state->z_near));
|
|
GE (glFogf (GL_FOG_END, fog_state->z_far));
|
|
}
|
|
else
|
|
GE (glDisable (GL_FOG));
|
|
}
|
|
|
|
#ifdef HAVE_COGL_GLES2
|
|
/* Let the GLES2 backend know that we're not using a user shader
|
|
anymore. This is a massive hack but it will go away once the GLSL
|
|
backend replaces the GLES2 wrapper */
|
|
_cogl_gles2_use_program (0);
|
|
#endif
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
const CoglPipelineBackend _cogl_pipeline_fixed_backend =
|
|
{
|
|
_cogl_pipeline_backend_fixed_get_max_texture_units,
|
|
_cogl_pipeline_backend_fixed_start,
|
|
_cogl_pipeline_backend_fixed_add_layer,
|
|
NULL, /* passthrough */
|
|
_cogl_pipeline_backend_fixed_end,
|
|
NULL, /* pipeline_change_notify */
|
|
NULL, /* pipeline_set_parent_notify */
|
|
NULL, /* layer_change_notify */
|
|
NULL /* free_priv */
|
|
};
|
|
|
|
#endif /* COGL_PIPELINE_BACKEND_FIXED */
|
|
|