144 lines
4.9 KiB
C++
144 lines
4.9 KiB
C++
/*
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** Copyright 2007, 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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#include <ctype.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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#include <cutils/log.h>
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#include <cutils/properties.h>
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#include "hooks.h"
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#include "egl_impl.h"
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using namespace android;
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// ----------------------------------------------------------------------------
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// Actual GL entry-points
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// ----------------------------------------------------------------------------
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#undef API_ENTRY
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#undef CALL_GL_API
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#undef CALL_GL_API_RETURN
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#if USE_FAST_TLS_KEY
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#if defined(__arm__)
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#define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n"
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#define API_ENTRY(_api) __attribute__((naked)) _api
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#define CALL_GL_API(_api, ...) \
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asm volatile( \
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GET_TLS(r12) \
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"ldr r12, [r12, %[tls]] \n" \
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"cmp r12, #0 \n" \
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"ldrne pc, [r12, %[api]] \n" \
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"mov r0, #0 \n" \
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"bx lr \n" \
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: \
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: [tls] "J"(TLS_SLOT_OPENGL_API*4), \
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[api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \
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: \
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);
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#elif defined(__mips__)
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#define API_ENTRY(_api) __attribute__((noinline)) _api
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#define CALL_GL_API(_api, ...) \
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register unsigned int t0 asm("t0"); \
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register unsigned int fn asm("t1"); \
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register unsigned int tls asm("v1"); \
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register unsigned int v0 asm("v0"); \
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asm volatile( \
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".set push\n\t" \
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".set noreorder\n\t" \
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".set mips32r2\n\t" \
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"rdhwr %[tls], $29\n\t" \
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"lw %[t0], %[OPENGL_API](%[tls])\n\t" \
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"beqz %[t0], 1f\n\t" \
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" move %[fn],$ra\n\t" \
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"lw %[fn], %[API](%[t0])\n\t" \
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"movz %[fn], $ra, %[fn]\n\t" \
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"1:\n\t" \
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"j %[fn]\n\t" \
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" move %[v0], $0\n\t" \
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".set pop\n\t" \
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: [fn] "=c"(fn), \
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[tls] "=&r"(tls), \
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[t0] "=&r"(t0), \
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[v0] "=&r"(v0) \
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: [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \
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[API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
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: \
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);
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#else
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#error Unsupported architecture
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#endif
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#define CALL_GL_API_RETURN(_api, ...) \
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CALL_GL_API(_api, __VA_ARGS__) \
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return 0; // placate gcc's warnings. never reached.
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#else
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#define API_ENTRY(_api) _api
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#define CALL_GL_API(_api, ...) \
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gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
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_c->_api(__VA_ARGS__);
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#define CALL_GL_API_RETURN(_api, ...) \
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gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
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return _c->_api(__VA_ARGS__)
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#endif
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extern "C" {
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#include "gl2_api.in"
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#include "gl2ext_api.in"
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}
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#undef API_ENTRY
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#undef CALL_GL_API
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#undef CALL_GL_API_RETURN
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/*
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* glGetString() is special because we expose some extensions in the wrapper
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*/
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extern "C" const GLubyte * __glGetString(GLenum name);
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const GLubyte * glGetString(GLenum name)
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{
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const GLubyte * ret = egl_get_string_for_current_context(name);
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if (ret == NULL) {
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ret = __glGetString(name);
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}
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return ret;
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}
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