40b73a8c0c
Buffer objects are cool! This abstracts the buffer API first introduced by GL_ARB_vertex_buffer_object and then extended to other objects. The coglBuffer abstract class is intended to be the base class of all the buffer objects, letting the user map() buffers. If the underlying implementation does not support buffer objects (or only support VBO but not FBO for instance), fallback paths should be provided.
143 lines
4.1 KiB
C
143 lines
4.1 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __COGL_CONTEXT_H
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#define __COGL_CONTEXT_H
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#include "cogl-internal.h"
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#include "cogl-context-driver.h"
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#include "cogl-primitives.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-material-private.h"
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#include "cogl-atlas.h"
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#include "cogl-buffer-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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typedef struct
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{
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/* Features cache */
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CoglFeatureFlags feature_flags;
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gboolean features_cached;
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CoglHandle default_material;
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/* Enable cache */
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gulong enable_flags;
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guint8 color_alpha;
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gboolean enable_backface_culling;
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CoglFrontWinding flushed_front_winding;
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gboolean indirect;
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/* A few handy matrix constants */
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CoglMatrix identity_matrix;
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CoglMatrix y_flip_matrix;
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/* Client-side matrix stack or NULL if none */
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CoglMatrixMode flushed_matrix_mode;
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GList *texture_units;
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/* Materials */
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CoglHandle simple_material;
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CoglHandle source_material;
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/* Textures */
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CoglHandle default_gl_texture_2d_tex;
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CoglHandle default_gl_texture_rect_tex;
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/* Batching geometry... */
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/* We journal the texture rectangles we want to submit to OpenGL so
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* we have an oppertunity to optimise the final order so that we
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* can batch things together. */
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GArray *journal;
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GArray *logged_vertices;
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GArray *polygon_vertices;
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/* Some simple caching, to minimize state changes... */
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CoglHandle current_material;
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gulong current_material_flags;
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CoglMaterialFlushOptions current_material_flush_options;
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GArray *current_layers;
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guint n_texcoord_arrays_enabled;
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/* PBOs */
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/* This can be used to check if a pbo is bound */
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CoglBuffer *current_pbo;
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/* Framebuffers */
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GSList *framebuffer_stack;
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CoglHandle window_buffer;
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gboolean dirty_bound_framebuffer;
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gboolean dirty_gl_viewport;
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/* Primitives */
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floatVec2 path_start;
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floatVec2 path_pen;
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GArray *path_nodes;
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guint last_path;
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floatVec2 path_nodes_min;
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floatVec2 path_nodes_max;
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CoglHandle stencil_material;
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/* Pre-generated VBOs containing indices to generate GL_TRIANGLES
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out of a vertex array of quads */
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CoglHandle quad_indices_byte;
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guint quad_indices_short_len;
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CoglHandle quad_indices_short;
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gboolean in_begin_gl_block;
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CoglHandle texture_download_material;
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CoglAtlas *atlas;
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CoglHandle atlas_texture;
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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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guint8 journal_rectangles_color;
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CoglContextDriver drv;
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} CoglContext;
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CoglContext *
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_cogl_context_get_default ();
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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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#endif /* __COGL_CONTEXT_H */
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