657 lines
18 KiB
C++
657 lines
18 KiB
C++
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_OPENGLES_CONTEXT_H
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#define ANDROID_OPENGLES_CONTEXT_H
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#include <stdint.h>
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#include <stddef.h>
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#include <sys/types.h>
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#include <pthread.h>
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#ifdef HAVE_ANDROID_OS
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#include <bionic_tls.h>
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#endif
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#include <private/pixelflinger/ggl_context.h>
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#include <hardware/gralloc.h>
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#include <GLES/gl.h>
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#include <GLES/glext.h>
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struct android_native_buffer_t;
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namespace android {
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const unsigned int OGLES_NUM_COMPRESSED_TEXTURE_FORMATS = 10
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#ifdef GL_OES_compressed_ETC1_RGB8_texture
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+ 1
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#endif
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;
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class EGLTextureObject;
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class EGLSurfaceManager;
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class EGLBufferObjectManager;
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namespace gl {
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struct ogles_context_t;
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struct matrixx_t;
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struct transform_t;
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struct buffer_t;
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ogles_context_t* getGlContext();
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template<typename T>
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static inline void swap(T& a, T& b) {
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T t(a); a = b; b = t;
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}
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template<typename T>
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inline T max(T a, T b) {
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return a<b ? b : a;
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}
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template<typename T>
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inline T max(T a, T b, T c) {
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return max(a, max(b, c));
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}
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template<typename T>
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inline T min(T a, T b) {
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return a<b ? a : b;
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}
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template<typename T>
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inline T min(T a, T b, T c) {
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return min(a, min(b, c));
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}
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template<typename T>
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inline T min(T a, T b, T c, T d) {
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return min(min(a,b), min(c,d));
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}
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// ----------------------------------------------------------------------------
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// vertices
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// ----------------------------------------------------------------------------
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struct vec3_t {
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union {
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struct { GLfixed x, y, z; };
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struct { GLfixed r, g, b; };
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struct { GLfixed S, T, R; };
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GLfixed v[3];
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};
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};
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struct vec4_t {
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union {
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struct { GLfixed x, y, z, w; };
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struct { GLfixed r, g, b, a; };
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struct { GLfixed S, T, R, Q; };
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GLfixed v[4];
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};
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};
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struct vertex_t {
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enum {
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// these constant matter for our clipping
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CLIP_L = 0x0001, // clipping flags
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CLIP_R = 0x0002,
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CLIP_B = 0x0004,
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CLIP_T = 0x0008,
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CLIP_N = 0x0010,
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CLIP_F = 0x0020,
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EYE = 0x0040,
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RESERVED = 0x0080,
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USER_CLIP_0 = 0x0100, // user clipping flags
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USER_CLIP_1 = 0x0200,
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USER_CLIP_2 = 0x0400,
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USER_CLIP_3 = 0x0800,
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USER_CLIP_4 = 0x1000,
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USER_CLIP_5 = 0x2000,
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LIT = 0x4000, // lighting has been applied
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TT = 0x8000, // texture coords transformed
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FRUSTUM_CLIP_ALL= 0x003F,
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USER_CLIP_ALL = 0x3F00,
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CLIP_ALL = 0x3F3F,
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};
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// the fields below are arranged to minimize d-cache usage
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// we group together, by cache-line, the fields most likely to be used
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union {
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vec4_t obj;
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vec4_t eye;
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};
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vec4_t clip;
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uint32_t flags;
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size_t index; // cache tag, and vertex index
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GLfixed fog;
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uint8_t locked;
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uint8_t mru;
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uint8_t reserved[2];
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vec4_t window;
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vec4_t color;
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vec4_t texture[GGL_TEXTURE_UNIT_COUNT];
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uint32_t reserved1[4];
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inline void clear() {
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flags = index = locked = mru = 0;
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}
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};
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struct point_size_t {
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GGLcoord size;
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GLboolean smooth;
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};
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struct line_width_t {
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GGLcoord width;
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GLboolean smooth;
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};
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struct polygon_offset_t {
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GLfixed factor;
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GLfixed units;
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GLboolean enable;
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};
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// ----------------------------------------------------------------------------
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// arrays
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// ----------------------------------------------------------------------------
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struct array_t {
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typedef void (*fetcher_t)(ogles_context_t*, GLfixed*, const GLvoid*);
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fetcher_t fetch;
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GLvoid const* physical_pointer;
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GLint size;
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GLsizei stride;
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GLvoid const* pointer;
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buffer_t const* bo;
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uint16_t type;
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GLboolean enable;
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GLboolean pad;
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GLsizei bounds;
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void init(GLint, GLenum, GLsizei, const GLvoid *, const buffer_t*, GLsizei);
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inline void resolve();
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inline const GLubyte* element(GLint i) const {
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return (const GLubyte*)physical_pointer + i * stride;
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}
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};
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struct array_machine_t {
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array_t vertex;
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array_t normal;
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array_t color;
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array_t texture[GGL_TEXTURE_UNIT_COUNT];
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uint8_t activeTexture;
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uint8_t tmu;
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uint16_t cull;
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uint32_t flags;
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GLenum indicesType;
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buffer_t const* array_buffer;
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buffer_t const* element_array_buffer;
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void (*compileElements)(ogles_context_t*, vertex_t*, GLint, GLsizei);
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void (*compileElement)(ogles_context_t*, vertex_t*, GLint);
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void (*mvp_transform)(transform_t const*, vec4_t*, vec4_t const*);
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void (*mv_transform)(transform_t const*, vec4_t*, vec4_t const*);
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void (*tex_transform[2])(transform_t const*, vec4_t*, vec4_t const*);
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void (*perspective)(ogles_context_t*c, vertex_t* v);
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void (*clipVertex)(ogles_context_t* c, vertex_t* nv,
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GGLfixed t, const vertex_t* s, const vertex_t* p);
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void (*clipEye)(ogles_context_t* c, vertex_t* nv,
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GGLfixed t, const vertex_t* s, const vertex_t* p);
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};
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struct vertex_cache_t {
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enum {
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// must be at least 4
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// 3 vertice for triangles
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// or 2 + 2 for indexed triangles w/ cache contention
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VERTEX_BUFFER_SIZE = 8,
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// must be a power of two and at least 3
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VERTEX_CACHE_SIZE = 64, // 8 KB
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INDEX_BITS = 16,
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INDEX_MASK = ((1LU<<INDEX_BITS)-1),
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INDEX_SEQ = 1LU<<INDEX_BITS,
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};
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vertex_t* vBuffer;
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vertex_t* vCache;
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uint32_t sequence;
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void* base;
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uint32_t total;
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uint32_t misses;
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int64_t startTime;
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void init();
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void uninit();
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void clear();
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void dump_stats(GLenum mode);
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};
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// ----------------------------------------------------------------------------
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// fog
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// ----------------------------------------------------------------------------
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struct fog_t {
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GLfixed density;
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GLfixed start;
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GLfixed end;
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GLfixed invEndMinusStart;
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GLenum mode;
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GLfixed (*fog)(ogles_context_t* c, GLfixed z);
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};
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// ----------------------------------------------------------------------------
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// user clip planes
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// ----------------------------------------------------------------------------
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const unsigned int OGLES_MAX_CLIP_PLANES = 6;
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struct clip_plane_t {
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vec4_t equation;
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};
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struct user_clip_planes_t {
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clip_plane_t plane[OGLES_MAX_CLIP_PLANES];
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uint32_t enable;
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};
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// ----------------------------------------------------------------------------
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// lighting
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// ----------------------------------------------------------------------------
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const unsigned int OGLES_MAX_LIGHTS = 8;
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struct light_t {
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vec4_t ambient;
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vec4_t diffuse;
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vec4_t specular;
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vec4_t implicitAmbient;
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vec4_t implicitDiffuse;
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vec4_t implicitSpecular;
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vec4_t position; // position in eye space
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vec4_t objPosition;
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vec4_t normalizedObjPosition;
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vec4_t spotDir;
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vec4_t normalizedSpotDir;
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GLfixed spotExp;
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GLfixed spotCutoff;
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GLfixed spotCutoffCosine;
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GLfixed attenuation[3];
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GLfixed rConstAttenuation;
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GLboolean enable;
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};
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struct material_t {
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vec4_t ambient;
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vec4_t diffuse;
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vec4_t specular;
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vec4_t emission;
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GLfixed shininess;
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};
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struct light_model_t {
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vec4_t ambient;
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GLboolean twoSide;
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};
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struct color_material_t {
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GLenum face;
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GLenum mode;
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GLboolean enable;
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};
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struct lighting_t {
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light_t lights[OGLES_MAX_LIGHTS];
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material_t front;
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light_model_t lightModel;
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color_material_t colorMaterial;
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vec4_t implicitSceneEmissionAndAmbient;
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vec4_t objViewer;
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uint32_t enabledLights;
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GLboolean enable;
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GLenum shadeModel;
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typedef void (*light_fct_t)(ogles_context_t*, vertex_t*);
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void (*lightVertex)(ogles_context_t* c, vertex_t* v);
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void (*lightTriangle)(ogles_context_t* c,
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vertex_t* v0, vertex_t* v1, vertex_t* v2);
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};
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struct culling_t {
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GLenum cullFace;
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GLenum frontFace;
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GLboolean enable;
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};
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// ----------------------------------------------------------------------------
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// textures
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// ----------------------------------------------------------------------------
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struct texture_unit_t {
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GLuint name;
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EGLTextureObject* texture;
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uint8_t dirty;
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};
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struct texture_state_t
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{
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texture_unit_t tmu[GGL_TEXTURE_UNIT_COUNT];
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int active; // active tmu
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EGLTextureObject* defaultTexture;
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GGLContext* ggl;
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uint8_t packAlignment;
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uint8_t unpackAlignment;
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};
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// ----------------------------------------------------------------------------
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// transformation and matrices
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// ----------------------------------------------------------------------------
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struct matrixf_t;
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struct matrixx_t {
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GLfixed m[16];
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void load(const matrixf_t& rhs);
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};
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struct matrix_stack_t;
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struct matrixf_t {
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void loadIdentity();
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void load(const matrixf_t& rhs);
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inline GLfloat* editElements() { return m; }
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inline GLfloat const* elements() const { return m; }
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void set(const GLfixed* rhs);
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void set(const GLfloat* rhs);
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static void multiply(matrixf_t& r,
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const matrixf_t& lhs, const matrixf_t& rhs);
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void dump(const char* what);
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private:
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friend struct matrix_stack_t;
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GLfloat m[16];
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void load(const GLfixed* rhs);
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void load(const GLfloat* rhs);
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void multiply(const matrixf_t& rhs);
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void translate(GLfloat x, GLfloat y, GLfloat z);
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void scale(GLfloat x, GLfloat y, GLfloat z);
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void rotate(GLfloat a, GLfloat x, GLfloat y, GLfloat z);
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};
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enum {
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OP_IDENTITY = 0x00,
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OP_TRANSLATE = 0x01,
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OP_UNIFORM_SCALE = 0x02,
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OP_SCALE = 0x05,
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OP_ROTATE = 0x08,
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OP_SKEW = 0x10,
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OP_ALL = 0x1F
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};
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struct transform_t {
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enum {
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FLAGS_2D_PROJECTION = 0x1
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};
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matrixx_t matrix;
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uint32_t flags;
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uint32_t ops;
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union {
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struct {
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void (*point2)(transform_t const* t, vec4_t*, vec4_t const*);
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void (*point3)(transform_t const* t, vec4_t*, vec4_t const*);
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void (*point4)(transform_t const* t, vec4_t*, vec4_t const*);
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};
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void (*pointv[3])(transform_t const* t, vec4_t*, vec4_t const*);
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};
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void loadIdentity();
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void picker();
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void dump(const char* what);
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};
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struct mvui_transform_t : public transform_t
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{
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void picker();
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};
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struct matrix_stack_t {
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enum {
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DO_PICKER = 0x1,
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DO_FLOAT_TO_FIXED = 0x2
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};
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transform_t transform;
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uint8_t maxDepth;
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uint8_t depth;
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uint8_t dirty;
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uint8_t reserved;
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matrixf_t *stack;
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uint8_t *ops;
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void init(int depth);
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void uninit();
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void loadIdentity();
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void load(const GLfixed* rhs);
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void load(const GLfloat* rhs);
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void multiply(const matrixf_t& rhs);
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void translate(GLfloat x, GLfloat y, GLfloat z);
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void scale(GLfloat x, GLfloat y, GLfloat z);
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void rotate(GLfloat a, GLfloat x, GLfloat y, GLfloat z);
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GLint push();
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GLint pop();
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void validate();
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matrixf_t& top() { return stack[depth]; }
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const matrixf_t& top() const { return stack[depth]; }
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uint32_t top_ops() const { return ops[depth]; }
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inline bool isRigidBody() const {
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return !(ops[depth] & ~(OP_TRANSLATE|OP_UNIFORM_SCALE|OP_ROTATE));
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}
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};
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struct vp_transform_t {
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transform_t transform;
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matrixf_t matrix;
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GLfloat zNear;
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GLfloat zFar;
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void loadIdentity();
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};
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struct transform_state_t {
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enum {
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MODELVIEW = 0x01,
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PROJECTION = 0x02,
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VIEWPORT = 0x04,
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TEXTURE = 0x08,
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MVUI = 0x10,
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MVIT = 0x20,
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MVP = 0x40,
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};
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matrix_stack_t *current;
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matrix_stack_t modelview;
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matrix_stack_t projection;
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matrix_stack_t texture[GGL_TEXTURE_UNIT_COUNT];
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// modelview * projection
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transform_t mvp __attribute__((aligned(32)));
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// viewport transformation
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vp_transform_t vpt __attribute__((aligned(32)));
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// same for 4-D vertices
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transform_t mvp4;
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// full modelview inverse transpose
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transform_t mvit4;
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// upper 3x3 of mv-inverse-transpose (for normals)
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mvui_transform_t mvui;
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GLenum matrixMode;
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GLenum rescaleNormals;
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uint32_t dirty;
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void invalidate();
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void update_mvp();
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void update_mvit();
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void update_mvui();
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};
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struct viewport_t {
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GLint x;
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GLint y;
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GLsizei w;
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GLsizei h;
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struct {
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GLint x;
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GLint y;
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} surfaceport;
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struct {
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GLint x;
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GLint y;
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GLsizei w;
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GLsizei h;
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} scissor;
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};
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// ----------------------------------------------------------------------------
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// Lerping
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// ----------------------------------------------------------------------------
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struct compute_iterators_t
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{
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void initTriangle(
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vertex_t const* v0,
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vertex_t const* v1,
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vertex_t const* v2);
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void initLine(
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vertex_t const* v0,
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vertex_t const* v1);
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inline void initLerp(vertex_t const* v0, uint32_t enables);
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int iteratorsScale(int32_t it[3],
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int32_t c0, int32_t c1, int32_t c2) const;
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void iterators1616(GGLfixed it[3],
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GGLfixed c0, GGLfixed c1, GGLfixed c2) const;
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void iterators0032(int32_t it[3],
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int32_t c0, int32_t c1, int32_t c2) const;
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void iterators0032(int64_t it[3],
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int32_t c0, int32_t c1, int32_t c2) const;
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GGLcoord area() const { return m_area; }
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private:
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// don't change order of members here -- used by iterators.S
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GGLcoord m_dx01, m_dy10, m_dx20, m_dy02;
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GGLcoord m_x0, m_y0;
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GGLcoord m_area;
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uint8_t m_scale;
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uint8_t m_area_scale;
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uint8_t m_reserved[2];
|
|
|
|
};
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// state
|
|
// ----------------------------------------------------------------------------
|
|
|
|
#ifdef HAVE_ANDROID_OS
|
|
// We have a dedicated TLS slot in bionic
|
|
inline void setGlThreadSpecific(ogles_context_t *value) {
|
|
((uint32_t *)__get_tls())[TLS_SLOT_OPENGL] = (uint32_t)value;
|
|
}
|
|
inline ogles_context_t* getGlThreadSpecific() {
|
|
return (ogles_context_t *)(((unsigned *)__get_tls())[TLS_SLOT_OPENGL]);
|
|
}
|
|
#else
|
|
extern pthread_key_t gGLKey;
|
|
inline void setGlThreadSpecific(ogles_context_t *value) {
|
|
pthread_setspecific(gGLKey, value);
|
|
}
|
|
inline ogles_context_t* getGlThreadSpecific() {
|
|
return static_cast<ogles_context_t*>(pthread_getspecific(gGLKey));
|
|
}
|
|
#endif
|
|
|
|
|
|
struct prims_t {
|
|
typedef ogles_context_t* GL;
|
|
void (*renderPoint)(GL, vertex_t*);
|
|
void (*renderLine)(GL, vertex_t*, vertex_t*);
|
|
void (*renderTriangle)(GL, vertex_t*, vertex_t*, vertex_t*);
|
|
};
|
|
|
|
struct copybits_context_t {
|
|
// A handle to the blit engine, if it exists, else NULL.
|
|
int32_t minScale;
|
|
int32_t maxScale;
|
|
android_native_buffer_t* drawSurfaceBuffer;
|
|
};
|
|
|
|
struct ogles_context_t {
|
|
context_t rasterizer;
|
|
array_machine_t arrays __attribute__((aligned(32)));
|
|
texture_state_t textures;
|
|
transform_state_t transforms;
|
|
vertex_cache_t vc;
|
|
prims_t prims;
|
|
culling_t cull;
|
|
lighting_t lighting;
|
|
user_clip_planes_t clipPlanes;
|
|
compute_iterators_t lerp; __attribute__((aligned(32)));
|
|
vertex_t current;
|
|
vec4_t currentColorClamped;
|
|
vec3_t currentNormal;
|
|
viewport_t viewport;
|
|
point_size_t point;
|
|
line_width_t line;
|
|
polygon_offset_t polygonOffset;
|
|
fog_t fog;
|
|
uint32_t perspective : 1;
|
|
uint32_t transformTextures : 1;
|
|
EGLSurfaceManager* surfaceManager;
|
|
EGLBufferObjectManager* bufferObjectManager;
|
|
|
|
// copybits is only used if LIBAGL_USE_GRALLOC_COPYBITS is
|
|
// defined, but it is always present because ogles_context_t is a public
|
|
// struct that is used by clients of libagl. We want the size and offsets
|
|
// to stay the same, whether or not LIBAGL_USE_GRALLOC_COPYBITS is defined.
|
|
|
|
copybits_context_t copybits;
|
|
|
|
GLenum error;
|
|
|
|
static inline ogles_context_t* get() {
|
|
return getGlThreadSpecific();
|
|
}
|
|
|
|
};
|
|
|
|
}; // namespace gl
|
|
}; // namespace android
|
|
|
|
#endif // ANDROID_OPENGLES_CONTEXT_H
|
|
|