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/* libs/opengles/state.cpp
**
** Copyright 2006, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include <stdlib.h>
#include "context.h"
#include "fp.h"
#include "state.h"
#include "array.h"
#include "matrix.h"
#include "vertex.h"
#include "light.h"
#include "texture.h"
#include "BufferObjectManager.h"
#include "TextureObjectManager.h"
namespace android {
// ----------------------------------------------------------------------------
static char const * const gVendorString = "Android";
static char const * const gRendererString = "Android PixelFlinger 1.3";
static char const * const gVersionString = "OpenGL ES-CM 1.0";
static char const * const gExtensionsString =
"GL_OES_byte_coordinates " // OK
"GL_OES_fixed_point " // OK
"GL_OES_single_precision " // OK
"GL_OES_read_format " // OK
"GL_OES_compressed_paletted_texture " // OK
"GL_OES_draw_texture " // OK
"GL_OES_matrix_get " // OK
"GL_OES_query_matrix " // OK
// "GL_OES_point_size_array " // TODO
// "GL_OES_point_sprite " // TODO
"GL_OES_EGL_image " // OK
#ifdef GL_OES_compressed_ETC1_RGB8_texture
"GL_OES_compressed_ETC1_RGB8_texture " // OK
#endif
"GL_ARB_texture_compression " // OK
"GL_ARB_texture_non_power_of_two " // OK
"GL_ANDROID_user_clip_plane " // OK
"GL_ANDROID_vertex_buffer_object " // OK
"GL_ANDROID_generate_mipmap " // OK
;
// ----------------------------------------------------------------------------
#if 0
#pragma mark -
#endif
ogles_context_t *ogles_init(size_t extra)
{
void* const base = malloc(extra + sizeof(ogles_context_t) + 32);
if (!base) return 0;
ogles_context_t *c =
(ogles_context_t *)((ptrdiff_t(base) + extra + 31) & ~0x1FL);
memset(c, 0, sizeof(ogles_context_t));
ggl_init_context(&(c->rasterizer));
// XXX: this should be passed as an argument
sp<EGLSurfaceManager> smgr(new EGLSurfaceManager());
c->surfaceManager = smgr.get();
c->surfaceManager->incStrong(c);
sp<EGLBufferObjectManager> bomgr(new EGLBufferObjectManager());
c->bufferObjectManager = bomgr.get();
c->bufferObjectManager->incStrong(c);
ogles_init_array(c);
ogles_init_matrix(c);
ogles_init_vertex(c);
ogles_init_light(c);
ogles_init_texture(c);
c->rasterizer.base = base;
c->point.size = TRI_ONE;
c->line.width = TRI_ONE;
// in OpenGL, writing to the depth buffer is enabled by default.
c->rasterizer.procs.depthMask(c, 1);
// OpenGL enables dithering by default
c->rasterizer.procs.enable(c, GL_DITHER);
return c;
}
void ogles_uninit(ogles_context_t* c)
{
ogles_uninit_array(c);
ogles_uninit_matrix(c);
ogles_uninit_vertex(c);
ogles_uninit_light(c);
ogles_uninit_texture(c);
c->surfaceManager->decStrong(c);
c->bufferObjectManager->decStrong(c);
ggl_uninit_context(&(c->rasterizer));
free(c->rasterizer.base);
}
void _ogles_error(ogles_context_t* c, GLenum error)
{
if (c->error == GL_NO_ERROR)
c->error = error;
}
static bool stencilop_valid(GLenum op) {
switch (op) {
case GL_KEEP:
case GL_ZERO:
case GL_REPLACE:
case GL_INCR:
case GL_DECR:
case GL_INVERT:
return true;
}
return false;
}
static void enable_disable(ogles_context_t* c, GLenum cap, int enabled)
{
if ((cap >= GL_LIGHT0) && (cap<GL_LIGHT0+OGLES_MAX_LIGHTS)) {
c->lighting.lights[cap-GL_LIGHT0].enable = enabled;
c->lighting.enabledLights &= ~(1<<(cap-GL_LIGHT0));
c->lighting.enabledLights |= (enabled<<(cap-GL_LIGHT0));
return;
}
switch (cap) {
case GL_POINT_SMOOTH:
c->point.smooth = enabled;
break;
case GL_LINE_SMOOTH:
c->line.smooth = enabled;
break;
case GL_POLYGON_OFFSET_FILL:
c->polygonOffset.enable = enabled;
break;
case GL_CULL_FACE:
c->cull.enable = enabled;
break;
case GL_LIGHTING:
c->lighting.enable = enabled;
break;
case GL_COLOR_MATERIAL:
c->lighting.colorMaterial.enable = enabled;
break;
case GL_NORMALIZE:
case GL_RESCALE_NORMAL:
c->transforms.rescaleNormals = enabled ? cap : 0;
// XXX: invalidate mvit
break;
case GL_CLIP_PLANE0:
case GL_CLIP_PLANE1:
case GL_CLIP_PLANE2:
case GL_CLIP_PLANE3:
case GL_CLIP_PLANE4:
case GL_CLIP_PLANE5:
c->clipPlanes.enable &= ~(1<<(cap-GL_CLIP_PLANE0));
c->clipPlanes.enable |= (enabled<<(cap-GL_CLIP_PLANE0));
ogles_invalidate_perspective(c);
break;
case GL_FOG:
case GL_DEPTH_TEST:
ogles_invalidate_perspective(c);
// fall-through...
case GL_BLEND:
case GL_SCISSOR_TEST:
case GL_ALPHA_TEST:
case GL_COLOR_LOGIC_OP:
case GL_DITHER:
case GL_STENCIL_TEST:
case GL_TEXTURE_2D:
// these need to fall through into the rasterizer
c->rasterizer.procs.enableDisable(c, cap, enabled);
break;
case GL_MULTISAMPLE:
case GL_SAMPLE_ALPHA_TO_COVERAGE:
case GL_SAMPLE_ALPHA_TO_ONE:
case GL_SAMPLE_COVERAGE:
// not supported in this implementation
break;
default:
ogles_error(c, GL_INVALID_ENUM);
return;
}
}
// ----------------------------------------------------------------------------
}; // namespace android
// ----------------------------------------------------------------------------
using namespace android;
#if 0
#pragma mark -
#endif
// These ones are super-easy, we're not supporting those features!
void glSampleCoverage(GLclampf value, GLboolean invert) {
}
void glSampleCoveragex(GLclampx value, GLboolean invert) {
}
void glStencilFunc(GLenum func, GLint ref, GLuint mask) {
ogles_context_t* c = ogles_context_t::get();
if (func < GL_NEVER || func > GL_ALWAYS) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
// from OpenGL|ES 1.0 sepcification:
// If there is no stencil buffer, no stencil modification can occur
// and it is as if the stencil test always passes.
}
void glStencilOp(GLenum fail, GLenum zfail, GLenum zpass) {
ogles_context_t* c = ogles_context_t::get();
if ((stencilop_valid(fail) &
stencilop_valid(zfail) &
stencilop_valid(zpass)) == 0) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
}
// ----------------------------------------------------------------------------
void glAlphaFunc(GLenum func, GLclampf ref)
{
glAlphaFuncx(func, gglFloatToFixed(ref));
}
void glCullFace(GLenum mode)
{
ogles_context_t* c = ogles_context_t::get();
switch (mode) {
case GL_FRONT:
case GL_BACK:
case GL_FRONT_AND_BACK:
break;
default:
ogles_error(c, GL_INVALID_ENUM);
}
c->cull.cullFace = mode;
}
void glFrontFace(GLenum mode)
{
ogles_context_t* c = ogles_context_t::get();
switch (mode) {
case GL_CW:
case GL_CCW:
break;
default:
ogles_error(c, GL_INVALID_ENUM);
return;
}
c->cull.frontFace = mode;
}
void glHint(GLenum target, GLenum mode)
{
ogles_context_t* c = ogles_context_t::get();
switch (target) {
case GL_FOG_HINT:
case GL_GENERATE_MIPMAP_HINT:
case GL_LINE_SMOOTH_HINT:
break;
case GL_POINT_SMOOTH_HINT:
c->rasterizer.procs.enableDisable(c,
GGL_POINT_SMOOTH_NICE, mode==GL_NICEST);
break;
case GL_PERSPECTIVE_CORRECTION_HINT:
c->perspective = (mode == GL_NICEST) ? 1 : 0;
break;
default:
ogles_error(c, GL_INVALID_ENUM);
}
}
void glEnable(GLenum cap) {
ogles_context_t* c = ogles_context_t::get();
enable_disable(c, cap, 1);
}
void glDisable(GLenum cap) {
ogles_context_t* c = ogles_context_t::get();
enable_disable(c, cap, 0);
}
void glFinish()
{ // nothing to do for our software implementation
}
void glFlush()
{ // nothing to do for our software implementation
}
GLenum glGetError()
{
// From OpenGL|ES 1.0 specification:
// If more than one flag has recorded an error, glGetError returns
// and clears an arbitrary error flag value. Thus, glGetError should
// always be called in a loop, until it returns GL_NO_ERROR,
// if all error flags are to be reset.
ogles_context_t* c = ogles_context_t::get();
if (c->error) {
const GLenum ret(c->error);
c->error = 0;
return ret;
}
if (c->rasterizer.error) {
const GLenum ret(c->rasterizer.error);
c->rasterizer.error = 0;
return ret;
}
return GL_NO_ERROR;
}
const GLubyte* glGetString(GLenum string)
{
switch (string) {
case GL_VENDOR: return (const GLubyte*)gVendorString;
case GL_RENDERER: return (const GLubyte*)gRendererString;
case GL_VERSION: return (const GLubyte*)gVersionString;
case GL_EXTENSIONS: return (const GLubyte*)gExtensionsString;
}
ogles_context_t* c = ogles_context_t::get();
ogles_error(c, GL_INVALID_ENUM);
return 0;
}
void glGetIntegerv(GLenum pname, GLint *params)
{
int i;
ogles_context_t* c = ogles_context_t::get();
switch (pname) {
case GL_ALIASED_POINT_SIZE_RANGE:
params[0] = 0;
params[1] = GGL_MAX_ALIASED_POINT_SIZE;
break;
case GL_ALIASED_LINE_WIDTH_RANGE:
params[0] = 0;
params[1] = GGL_MAX_ALIASED_POINT_SIZE;
break;
case GL_ALPHA_BITS: {
int index = c->rasterizer.state.buffers.color.format;
GGLFormat const * formats = gglGetPixelFormatTable();
params[0] = formats[index].ah - formats[index].al;
break;
}
case GL_RED_BITS: {
int index = c->rasterizer.state.buffers.color.format;
GGLFormat const * formats = gglGetPixelFormatTable();
params[0] = formats[index].rh - formats[index].rl;
break;
}
case GL_GREEN_BITS: {
int index = c->rasterizer.state.buffers.color.format;
GGLFormat const * formats = gglGetPixelFormatTable();
params[0] = formats[index].gh - formats[index].gl;
break;
}
case GL_BLUE_BITS: {
int index = c->rasterizer.state.buffers.color.format;
GGLFormat const * formats = gglGetPixelFormatTable();
params[0] = formats[index].bh - formats[index].bl;
break;
}
case GL_COMPRESSED_TEXTURE_FORMATS:
params[ 0] = GL_PALETTE4_RGB8_OES;
params[ 1] = GL_PALETTE4_RGBA8_OES;
params[ 2] = GL_PALETTE4_R5_G6_B5_OES;
params[ 3] = GL_PALETTE4_RGBA4_OES;
params[ 4] = GL_PALETTE4_RGB5_A1_OES;
params[ 5] = GL_PALETTE8_RGB8_OES;
params[ 6] = GL_PALETTE8_RGBA8_OES;
params[ 7] = GL_PALETTE8_R5_G6_B5_OES;
params[ 8] = GL_PALETTE8_RGBA4_OES;
params[ 9] = GL_PALETTE8_RGB5_A1_OES;
i = 10;
#ifdef GL_OES_compressed_ETC1_RGB8_texture
params[i++] = GL_ETC1_RGB8_OES;
#endif
break;
case GL_DEPTH_BITS:
params[0] = c->rasterizer.state.buffers.depth.format ? 0 : 16;
break;
case GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES:
params[0] = GL_RGB;
break;
case GL_IMPLEMENTATION_COLOR_READ_TYPE_OES:
params[0] = GL_UNSIGNED_SHORT_5_6_5;
break;
case GL_MAX_LIGHTS:
params[0] = OGLES_MAX_LIGHTS;
break;
case GL_MAX_CLIP_PLANES:
params[0] = OGLES_MAX_CLIP_PLANES;
break;
case GL_MAX_MODELVIEW_STACK_DEPTH:
params[0] = OGLES_MODELVIEW_STACK_DEPTH;
break;
case GL_MAX_PROJECTION_STACK_DEPTH:
params[0] = OGLES_PROJECTION_STACK_DEPTH;
break;
case GL_MAX_TEXTURE_STACK_DEPTH:
params[0] = OGLES_TEXTURE_STACK_DEPTH;
break;
case GL_MAX_TEXTURE_SIZE:
params[0] = GGL_MAX_TEXTURE_SIZE;
break;
case GL_MAX_TEXTURE_UNITS:
params[0] = GGL_TEXTURE_UNIT_COUNT;
break;
case GL_MAX_VIEWPORT_DIMS:
params[0] = GGL_MAX_VIEWPORT_DIMS;
params[1] = GGL_MAX_VIEWPORT_DIMS;
break;
case GL_NUM_COMPRESSED_TEXTURE_FORMATS:
params[0] = OGLES_NUM_COMPRESSED_TEXTURE_FORMATS;
break;
case GL_SMOOTH_LINE_WIDTH_RANGE:
params[0] = 0;
params[1] = GGL_MAX_SMOOTH_LINE_WIDTH;
break;
case GL_SMOOTH_POINT_SIZE_RANGE:
params[0] = 0;
params[1] = GGL_MAX_SMOOTH_POINT_SIZE;
break;
case GL_STENCIL_BITS:
params[0] = 0;
break;
case GL_SUBPIXEL_BITS:
params[0] = GGL_SUBPIXEL_BITS;
break;
case GL_MODELVIEW_MATRIX_FLOAT_AS_INT_BITS_OES:
memcpy( params,
c->transforms.modelview.top().elements(),
16*sizeof(GLint));
break;
case GL_PROJECTION_MATRIX_FLOAT_AS_INT_BITS_OES:
memcpy( params,
c->transforms.projection.top().elements(),
16*sizeof(GLint));
break;
case GL_TEXTURE_MATRIX_FLOAT_AS_INT_BITS_OES:
memcpy( params,
c->transforms.texture[c->textures.active].top().elements(),
16*sizeof(GLint));
break;
default:
ogles_error(c, GL_INVALID_ENUM);
break;
}
}
// ----------------------------------------------------------------------------
void glPointSize(GLfloat size)
{
ogles_context_t* c = ogles_context_t::get();
if (size <= 0) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
c->point.size = TRI_FROM_FIXED(gglFloatToFixed(size));
}
void glPointSizex(GLfixed size)
{
ogles_context_t* c = ogles_context_t::get();
if (size <= 0) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
c->point.size = TRI_FROM_FIXED(size);
}
// ----------------------------------------------------------------------------
void glLineWidth(GLfloat width)
{
ogles_context_t* c = ogles_context_t::get();
if (width <= 0) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
c->line.width = TRI_FROM_FIXED(gglFloatToFixed(width));
}
void glLineWidthx(GLfixed width)
{
ogles_context_t* c = ogles_context_t::get();
if (width <= 0) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
c->line.width = TRI_FROM_FIXED(width);
}
// ----------------------------------------------------------------------------
void glColorMask(GLboolean r, GLboolean g, GLboolean b, GLboolean a) {
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.colorMask(c, r, g, b, a);
}
void glDepthMask(GLboolean flag) {
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.depthMask(c, flag);
}
void glStencilMask(GLuint mask) {
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.stencilMask(c, mask);
}
void glDepthFunc(GLenum func) {
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.depthFunc(c, func);
}
void glLogicOp(GLenum opcode) {
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.logicOp(c, opcode);
}
void glAlphaFuncx(GLenum func, GLclampx ref) {
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.alphaFuncx(c, func, ref);
}
void glBlendFunc(GLenum sfactor, GLenum dfactor) {
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.blendFunc(c, sfactor, dfactor);
}
void glClear(GLbitfield mask) {
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.clear(c, mask);
}
void glClearColorx(GLclampx red, GLclampx green, GLclampx blue, GLclampx alpha) {
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.clearColorx(c, red, green, blue, alpha);
}
void glClearColor(GLclampf r, GLclampf g, GLclampf b, GLclampf a)
{
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.clearColorx(c,
gglFloatToFixed(r),
gglFloatToFixed(g),
gglFloatToFixed(b),
gglFloatToFixed(a));
}
void glClearDepthx(GLclampx depth) {
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.clearDepthx(c, depth);
}
void glClearDepthf(GLclampf depth)
{
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.clearDepthx(c, gglFloatToFixed(depth));
}
void glClearStencil(GLint s) {
ogles_context_t* c = ogles_context_t::get();
c->rasterizer.procs.clearStencil(c, s);
}