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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrGLUtil.h"
void GrGLClearErr(const GrGLInterface* gl) {
while (GR_GL_NO_ERROR != gl->fGetError()) {}
}
namespace {
const char *get_error_string(uint32_t err) {
switch (err) {
case GR_GL_NO_ERROR:
return "";
case GR_GL_INVALID_ENUM:
return "Invalid Enum";
case GR_GL_INVALID_VALUE:
return "Invalid Value";
case GR_GL_INVALID_OPERATION:
return "Invalid Operation";
case GR_GL_OUT_OF_MEMORY:
return "Out of Memory";
case GR_GL_CONTEXT_LOST:
return "Context Lost";
}
return "Unknown";
}
}
void GrGLCheckErr(const GrGLInterface* gl,
const char* location,
const char* call) {
uint32_t err = GR_GL_GET_ERROR(gl);
if (GR_GL_NO_ERROR != err) {
GrPrintf("---- glGetError 0x%x(%s)", err, get_error_string(err));
if (NULL != location) {
GrPrintf(" at\n\t%s", location);
}
if (NULL != call) {
GrPrintf("\n\t\t%s", call);
}
GrPrintf("\n");
}
}
///////////////////////////////////////////////////////////////////////////////
#if GR_GL_LOG_CALLS
bool gLogCallsGL = !!(GR_GL_LOG_CALLS_START);
#endif
#if GR_GL_CHECK_ERROR
bool gCheckErrorGL = !!(GR_GL_CHECK_ERROR_START);
#endif
///////////////////////////////////////////////////////////////////////////////
GrGLBinding GrGLGetBindingInUseFromString(const char* versionString) {
if (NULL == versionString) {
GrAssert(!"NULL GL version string.");
return kNone_GrGLBinding;
}
int major, minor;
// check for desktop
int n = sscanf(versionString, "%d.%d", &major, &minor);
if (2 == n) {
return kDesktop_GrGLBinding;
}
// check for ES 1
char profile[2];
n = sscanf(versionString, "OpenGL ES-%c%c %d.%d", profile, profile+1,
&major, &minor);
if (4 == n) {
// we no longer support ES1.
return kNone_GrGLBinding;
}
// check for ES2
n = sscanf(versionString, "OpenGL ES %d.%d", &major, &minor);
if (2 == n) {
return kES2_GrGLBinding;
}
return kNone_GrGLBinding;
}
GrGLVersion GrGLGetVersionFromString(const char* versionString) {
if (NULL == versionString) {
GrAssert(!"NULL GL version string.");
return 0;
}
int major, minor;
int n = sscanf(versionString, "%d.%d", &major, &minor);
if (2 == n) {
return GR_GL_VER(major, minor);
}
char profile[2];
n = sscanf(versionString, "OpenGL ES-%c%c %d.%d", profile, profile+1,
&major, &minor);
if (4 == n) {
return GR_GL_VER(major, minor);
}
n = sscanf(versionString, "OpenGL ES %d.%d", &major, &minor);
if (2 == n) {
return GR_GL_VER(major, minor);
}
return 0;
}
GrGLSLVersion GrGLGetGLSLVersionFromString(const char* versionString) {
if (NULL == versionString) {
GrAssert(!"NULL GLSL version string.");
return 0;
}
int major, minor;
int n = sscanf(versionString, "%d.%d", &major, &minor);
if (2 == n) {
return GR_GLSL_VER(major, minor);
}
n = sscanf(versionString, "OpenGL ES GLSL ES %d.%d", &major, &minor);
if (2 == n) {
return GR_GLSL_VER(major, minor);
}
#ifdef SK_BUILD_FOR_ANDROID
// android hack until the gpu vender updates their drivers
n = sscanf(versionString, "OpenGL ES GLSL %d.%d", &major, &minor);
if (2 == n) {
return GR_GLSL_VER(major, minor);
}
#endif
return 0;
}
bool GrGLHasExtensionFromString(const char* ext, const char* extensionString) {
int extLength = strlen(ext);
while (true) {
int n = strcspn(extensionString, " ");
if (n == extLength && 0 == strncmp(ext, extensionString, n)) {
return true;
}
if (0 == extensionString[n]) {
return false;
}
extensionString += n+1;
}
return false;
}
bool GrGLHasExtension(const GrGLInterface* gl, const char* ext) {
const GrGLubyte* glstr;
GR_GL_CALL_RET(gl, glstr, GetString(GR_GL_EXTENSIONS));
return GrGLHasExtensionFromString(ext, (const char*) glstr);
}
GrGLBinding GrGLGetBindingInUse(const GrGLInterface* gl) {
const GrGLubyte* v;
GR_GL_CALL_RET(gl, v, GetString(GR_GL_VERSION));
return GrGLGetBindingInUseFromString((const char*) v);
}
GrGLVersion GrGLGetVersion(const GrGLInterface* gl) {
const GrGLubyte* v;
GR_GL_CALL_RET(gl, v, GetString(GR_GL_VERSION));
return GrGLGetVersionFromString((const char*) v);
}
GrGLSLVersion GrGLGetGLSLVersion(const GrGLInterface* gl) {
const GrGLubyte* v;
GR_GL_CALL_RET(gl, v, GetString(GR_GL_SHADING_LANGUAGE_VERSION));
return GrGLGetGLSLVersionFromString((const char*) v);
}
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