| /* 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 1.4"; |
| 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 |
| "GL_OES_EGL_sync " // 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); |
| [[fallthrough]]; |
| 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_TEXTURE_EXTERNAL_OES: |
| c->rasterizer.procs.enableDisable(c, GL_TEXTURE_2D, 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); |
| } |