317 lines
10 KiB
C
317 lines
10 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2007,2008,2009,2013 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*
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*/
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#ifndef __COGL_CONTEXT_PRIVATE_H
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#define __COGL_CONTEXT_PRIVATE_H
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#include "cogl-context.h"
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#include "cogl-flags.h"
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#include "cogl-display-private.h"
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#include "cogl-clip-stack.h"
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#include "cogl-matrix-stack.h"
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#include "cogl-pipeline-private.h"
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#include "cogl-buffer-private.h"
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#include "cogl-bitmask.h"
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#include "cogl-atlas.h"
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#include "cogl-driver.h"
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#include "cogl-texture-driver.h"
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#include "cogl-pipeline-cache.h"
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#include "cogl-texture-2d.h"
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#include "cogl-sampler-cache-private.h"
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#include "cogl-gl-header.h"
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#include "cogl-framebuffer-private.h"
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#include "cogl-offscreen-private.h"
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#include "cogl-onscreen-private.h"
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#include "cogl-fence-private.h"
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#include "cogl-poll-private.h"
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#include "cogl-private.h"
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#include "winsys/cogl-winsys-private.h"
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typedef struct
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{
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GLfloat v[3];
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GLfloat t[2];
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GLubyte c[4];
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} CoglTextureGLVertex;
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struct _CoglTimestampQuery
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{
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unsigned int id;
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};
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struct _CoglContext
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{
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CoglObject _parent;
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CoglDisplay *display;
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CoglDriver driver;
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/* vtables for the driver functions */
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const CoglDriverVtable *driver_vtable;
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const CoglTextureDriver *texture_driver;
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void *driver_context;
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int glsl_major;
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int glsl_minor;
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/* This is the GLSL version that we will claim that snippets are
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* written against using the #version pragma. This will be the
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* largest version that is less than or equal to the version
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* provided by the driver without massively altering the syntax. Eg,
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* we wouldn't use version 1.3 even if it is available because that
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* removes the ‘attribute’ and ‘varying’ keywords. */
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int glsl_version_to_use;
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/* Features cache */
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unsigned long features[COGL_FLAGS_N_LONGS_FOR_SIZE (_COGL_N_FEATURE_IDS)];
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unsigned long private_features
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[COGL_FLAGS_N_LONGS_FOR_SIZE (COGL_N_PRIVATE_FEATURES)];
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CoglPipeline *default_pipeline;
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CoglPipelineLayer *default_layer_0;
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CoglPipelineLayer *default_layer_n;
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CoglPipelineLayer *dummy_layer_dependant;
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GHashTable *attribute_name_states_hash;
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GArray *attribute_name_index_map;
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int n_attribute_names;
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CoglBitmask enabled_custom_attributes;
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/* These are temporary bitmasks that are used when disabling
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* builtin and custom attribute arrays. They are here just
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* to avoid allocating new ones each time */
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CoglBitmask enable_custom_attributes_tmp;
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CoglBitmask changed_bits_tmp;
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/* A few handy matrix constants */
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graphene_matrix_t identity_matrix;
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graphene_matrix_t y_flip_matrix;
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/* The matrix stack entries that should be flushed during the next
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* pipeline state flush */
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CoglMatrixEntry *current_projection_entry;
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CoglMatrixEntry *current_modelview_entry;
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CoglMatrixEntry identity_entry;
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/* Only used for comparing other pipelines when reading pixels. */
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CoglPipeline *opaque_color_pipeline;
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GString *codegen_header_buffer;
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GString *codegen_source_buffer;
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GString *codegen_boilerplate_buffer;
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CoglPipelineCache *pipeline_cache;
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/* Textures */
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CoglTexture2D *default_gl_texture_2d_tex;
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/* Central list of all framebuffers so all journals can be flushed
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* at any time. */
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GList *framebuffers;
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/* Global journal buffers */
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GArray *journal_flush_attributes_array;
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GArray *journal_clip_bounds;
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/* Some simple caching, to minimize state changes... */
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CoglPipeline *current_pipeline;
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unsigned long current_pipeline_changes_since_flush;
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gboolean current_pipeline_with_color_attrib;
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gboolean current_pipeline_unknown_color_alpha;
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unsigned long current_pipeline_age;
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gboolean gl_blend_enable_cache;
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gboolean depth_test_enabled_cache;
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CoglDepthTestFunction depth_test_function_cache;
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gboolean depth_writing_enabled_cache;
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float depth_range_near_cache;
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float depth_range_far_cache;
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CoglBuffer *current_buffer[COGL_BUFFER_BIND_TARGET_COUNT];
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/* Framebuffers */
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unsigned long current_draw_buffer_state_flushed;
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unsigned long current_draw_buffer_changes;
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CoglFramebuffer *current_draw_buffer;
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CoglFramebuffer *current_read_buffer;
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gboolean have_last_offscreen_allocate_flags;
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CoglOffscreenAllocateFlags last_offscreen_allocate_flags;
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GHashTable *swap_callback_closures;
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int next_swap_callback_id;
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CoglList onscreen_events_queue;
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CoglList onscreen_dirty_queue;
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CoglClosure *onscreen_dispatch_idle;
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/* This becomes TRUE the first time the context is bound to an
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* onscreen buffer. This is used by cogl-framebuffer-gl to determine
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* when to initialise the glDrawBuffer state */
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gboolean was_bound_to_onscreen;
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/* Primitives */
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CoglPipeline *stencil_pipeline;
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CoglIndices *rectangle_byte_indices;
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CoglIndices *rectangle_short_indices;
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int rectangle_short_indices_len;
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CoglPipeline *blit_texture_pipeline;
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GSList *atlases;
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GHookList atlas_reorganize_callbacks;
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/* This debugging variable is used to pick a colour for visually
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displaying the quad batches. It needs to be global so that it can
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be reset by cogl_clear. It needs to be reset to increase the
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chances of getting the same colour during an animation */
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uint8_t journal_rectangles_color;
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/* Cached values for GL_MAX_TEXTURE_[IMAGE_]UNITS to avoid calling
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glGetInteger too often */
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GLint max_texture_units;
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GLint max_texture_image_units;
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GLint max_activateable_texture_units;
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/* Fragment processing programs */
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GLuint current_gl_program;
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gboolean current_gl_dither_enabled;
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GLenum current_gl_draw_buffer;
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/* Clipping */
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/* TRUE if we have a valid clipping stack flushed. In that case
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current_clip_stack will describe what the current state is. If
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this is FALSE then the current clip stack is completely unknown
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so it will need to be reflushed. In that case current_clip_stack
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doesn't need to be a valid pointer. We can't just use NULL in
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current_clip_stack to mark a dirty state because NULL is a valid
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stack (meaning no clipping) */
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gboolean current_clip_stack_valid;
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/* The clip state that was flushed. This isn't intended to be used
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as a stack to push and pop new entries. Instead the current stack
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that the user wants is part of the framebuffer state. This is
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just used to record the flush state so we can avoid flushing the
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same state multiple times. When the clip state is flushed this
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will hold a reference */
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CoglClipStack *current_clip_stack;
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/* This is used as a temporary buffer to fill a CoglBuffer when
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cogl_buffer_map fails and we only want to map to fill it with new
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data */
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GByteArray *buffer_map_fallback_array;
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gboolean buffer_map_fallback_in_use;
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size_t buffer_map_fallback_offset;
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CoglSamplerCache *sampler_cache;
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unsigned long winsys_features
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[COGL_FLAGS_N_LONGS_FOR_SIZE (COGL_WINSYS_FEATURE_N_FEATURES)];
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void *winsys;
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/* Array of names of uniforms. These are used like quarks to give a
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unique number to each uniform name except that we ensure that
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they increase sequentially so that we can use the id as an index
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into a bitfield representing the uniforms that a pipeline
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overrides from its parent. */
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GPtrArray *uniform_names;
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/* A hash table to quickly get an index given an existing name. The
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name strings are owned by the uniform_names array. The values are
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the uniform location cast to a pointer. */
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GHashTable *uniform_name_hash;
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int n_uniform_names;
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CoglPollSource *fences_poll_source;
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CoglList fences;
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GHashTable *named_pipelines;
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/* This defines a list of function pointers that Cogl uses from
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either GL or GLES. All functions are accessed indirectly through
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these pointers rather than linking to them directly */
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#ifndef APIENTRY
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#define APIENTRY
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#endif
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#define COGL_EXT_BEGIN(name, \
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min_gl_major, min_gl_minor, \
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gles_availability, \
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extension_suffixes, extension_names)
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#define COGL_EXT_FUNCTION(ret, name, args) \
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ret (APIENTRY * name) args;
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#define COGL_EXT_END()
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#include "gl-prototypes/cogl-all-functions.h"
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#undef COGL_EXT_BEGIN
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#undef COGL_EXT_FUNCTION
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#undef COGL_EXT_END
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};
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COGL_EXPORT CoglContext *
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_cogl_context_get_default (void);
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const CoglWinsysVtable *
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_cogl_context_get_winsys (CoglContext *context);
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/* Query the GL extensions and lookup the corresponding function
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* pointers. Theoretically the list of extensions can change for
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* different GL contexts so it is the winsys backend's responsibility
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* to know when to re-query the GL extensions. The backend should also
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* check whether the GL context is supported by Cogl. If not it should
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* return FALSE and set @error */
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gboolean
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_cogl_context_update_features (CoglContext *context,
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GError **error);
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/* Obtains the context and returns retval if NULL */
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#define _COGL_GET_CONTEXT(ctxvar, retval) \
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CoglContext *ctxvar = _cogl_context_get_default (); \
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if (ctxvar == NULL) return retval;
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#define NO_RETVAL
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void
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_cogl_context_set_current_projection_entry (CoglContext *context,
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CoglMatrixEntry *entry);
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void
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_cogl_context_set_current_modelview_entry (CoglContext *context,
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CoglMatrixEntry *entry);
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#endif /* __COGL_CONTEXT_PRIVATE_H */
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