| |
| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| |
| #ifndef GrGLConfig_DEFINED |
| #define GrGLConfig_DEFINED |
| |
| #include "GrTypes.h" |
| #include "GrGLDefines.h" |
| |
| /** |
| * Optional GL config file. |
| */ |
| #ifdef GR_GL_CUSTOM_SETUP_HEADER |
| #include GR_GL_CUSTOM_SETUP_HEADER |
| #endif |
| |
| #if !defined(GR_GL_FUNCTION_TYPE) |
| #define GR_GL_FUNCTION_TYPE |
| #endif |
| |
| /** |
| * The following are optional defines that can be enabled at the compiler |
| * command line, in a IDE project, in a GrUserConfig.h file, or in a GL custom |
| * file (if one is in use). If a GR_GL_CUSTOM_SETUP_HEADER is used they can |
| * also be placed there. |
| * |
| * GR_GL_LOG_CALLS: if 1 Gr can print every GL call using GrPrintf. Defaults to |
| * 0. Logging can be enabled and disabled at runtime using a debugger via to |
| * global gLogCallsGL. The initial value of gLogCallsGL is controlled by |
| * GR_GL_LOG_CALLS_START. |
| * |
| * GR_GL_LOG_CALLS_START: controls the initial value of gLogCallsGL when |
| * GR_GL_LOG_CALLS is 1. Defaults to 0. |
| * |
| * GR_GL_CHECK_ERROR: if enabled Gr can do a glGetError() after every GL call. |
| * Defaults to 1 if GR_DEBUG is set, otherwise 0. When GR_GL_CHECK_ERROR is 1 |
| * this can be toggled in a debugger using the gCheckErrorGL global. The initial |
| * value of gCheckErrorGL is controlled by by GR_GL_CHECK_ERROR_START. |
| * |
| * GR_GL_CHECK_ERROR_START: controls the initial value of gCheckErrorGL |
| * when GR_GL_CHECK_ERROR is 1. Defaults to 1. |
| * |
| * GR_GL_NO_CONSTANT_ATTRIBUTES: if this evaluates to true then the GL backend |
| * will use uniforms instead of attributes in all cases when there is not |
| * per-vertex data. This is important when the underlying GL implementation |
| * doesn't actually support immediate style attribute values (e.g. when |
| * the GL stream is converted to DX as in ANGLE on Chrome). Defaults to 0. |
| * |
| * GR_GL_ATTRIBUTE_MATRICES: If changing uniforms is very expensive it may be |
| * faster to use vertex attributes for matrices (set via glVertexAttrib3fv). |
| * Setting this build flag enables this behavior. GR_GL_NO_CONSTANT_ATTRIBUTES |
| * must not be set since this uses constant attributes for the matrices. |
| * Defaults to 0. |
| * |
| * GR_GL_USE_BUFFER_DATA_NULL_HINT: When specifing new data for a vertex/index |
| * buffer that replaces old data Ganesh can give a hint to the driver that the |
| * previous data will not be used in future draws like this: |
| * glBufferData(GL_..._BUFFER, size, NULL, usage); //<--hint, NULL means |
| * glBufferSubData(GL_..._BUFFER, 0, lessThanSize, data) // old data can't be |
| * // used again. |
| * However, this can be an unoptimization on some platforms, esp. Chrome. |
| * Chrome's cmd buffer will create a new allocation and memset the whole thing |
| * to zero (for security reasons). Defaults to 1 (enabled). |
| * |
| * GR_GL_PER_GL_FUNC_CALLBACK: When set to 1 the GrGLInterface object provides |
| * a function pointer that is called just before every gl function. The ptr must |
| * be valid (i.e. there is no NULL check). However, by default the callback will |
| * be set to a function that does nothing. The signature of the function is: |
| * void function(const GrGLInterface*) |
| * It is not extern "C". |
| * The GrGLInterface field fCallback specifies the function ptr and there is an |
| * additional field fCallbackData of type intptr_t for client data. |
| * |
| * GR_GL_RGBA_8888_PIXEL_OPS_SLOW: Set this to 1 if it is known that performing |
| * glReadPixels / glTex(Sub)Image with format=GL_RGBA, type=GL_UNISIGNED_BYTE is |
| * significantly slower than format=GL_BGRA, type=GL_UNISIGNED_BYTE. |
| * |
| * GR_GL_FULL_READPIXELS_FASTER_THAN_PARTIAL: Set this to 1 if calling |
| * glReadPixels to read the entire framebuffer is faster than calling it with |
| * the same sized rectangle but with a framebuffer bound that is larger than |
| * the rectangle read. |
| * |
| * GR_GL_CHECK_ALLOC_WITH_GET_ERROR: If set to 1 this will then glTexImage, |
| * glBufferData, glRenderbufferStorage, etc will be checked for errors. This |
| * amounts to ensuring the error is GL_NO_ERROR, calling the allocating |
| * function, and then checking that the error is still GL_NO_ERROR. When the |
| * value is 0 we will assume no error was generated without checking. |
| */ |
| |
| #if !defined(GR_GL_LOG_CALLS) |
| #define GR_GL_LOG_CALLS GR_DEBUG |
| #endif |
| |
| #if !defined(GR_GL_LOG_CALLS_START) |
| #define GR_GL_LOG_CALLS_START 0 |
| #endif |
| |
| #if !defined(GR_GL_CHECK_ERROR) |
| #define GR_GL_CHECK_ERROR GR_DEBUG |
| #endif |
| |
| #if !defined(GR_GL_CHECK_ERROR_START) |
| #define GR_GL_CHECK_ERROR_START 1 |
| #endif |
| |
| #if !defined(GR_GL_NO_CONSTANT_ATTRIBUTES) |
| #define GR_GL_NO_CONSTANT_ATTRIBUTES 0 |
| #endif |
| |
| #if !defined(GR_GL_ATTRIBUTE_MATRICES) |
| #define GR_GL_ATTRIBUTE_MATRICES 0 |
| #endif |
| |
| #if !defined(GR_GL_USE_BUFFER_DATA_NULL_HINT) |
| #define GR_GL_USE_BUFFER_DATA_NULL_HINT 1 |
| #endif |
| |
| #if !defined(GR_GL_PER_GL_FUNC_CALLBACK) |
| #define GR_GL_PER_GL_FUNC_CALLBACK 0 |
| #endif |
| |
| #if !defined(GR_GL_RGBA_8888_PIXEL_OPS_SLOW) |
| #define GR_GL_RGBA_8888_PIXEL_OPS_SLOW 0 |
| #endif |
| |
| #if !defined(GR_GL_FULL_READPIXELS_FASTER_THAN_PARTIAL) |
| #define GR_GL_FULL_READPIXELS_FASTER_THAN_PARTIAL 0 |
| #endif |
| |
| #if !defined(GR_GL_CHECK_ALLOC_WITH_GET_ERROR) |
| #define GR_GL_CHECK_ALLOC_WITH_GET_ERROR 1 |
| #endif |
| |
| #if(GR_GL_NO_CONSTANT_ATTRIBUTES) && (GR_GL_ATTRIBUTE_MATRICES) |
| #error "Cannot combine GR_GL_NO_CONSTANT_ATTRIBUTES and GR_GL_ATTRIBUTE_MATRICES" |
| #endif |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| #if GR_SCALAR_IS_FIXED |
| #define GrGLType GL_FIXED |
| #elif GR_SCALAR_IS_FLOAT |
| #define GrGLType GR_GL_FLOAT |
| #else |
| #error "unknown GR_SCALAR type" |
| #endif |
| |
| #if GR_TEXT_SCALAR_IS_USHORT |
| #define GrGLTextType GR_GL_UNSIGNED_SHORT |
| #define GR_GL_TEXT_TEXTURE_NORMALIZED 1 |
| #elif GR_TEXT_SCALAR_IS_FLOAT |
| #define GrGLTextType GR_GL_FLOAT |
| #define GR_GL_TEXT_TEXTURE_NORMALIZED 0 |
| #elif GR_TEXT_SCALAR_IS_FIXED |
| #define GrGLTextType GR_GL_FIXED |
| #define GR_GL_TEXT_TEXTURE_NORMALIZED 0 |
| #else |
| #error "unknown GR_TEXT_SCALAR type" |
| #endif |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| struct GrGLInterface; |
| |
| extern void GrGLCheckErr(const GrGLInterface* gl, |
| const char* location, |
| const char* call); |
| |
| extern void GrGLClearErr(const GrGLInterface* gl); |
| |
| #if GR_GL_CHECK_ERROR |
| extern bool gCheckErrorGL; |
| #define GR_GL_CHECK_ERROR_IMPL(IFACE, X) \ |
| if (gCheckErrorGL) \ |
| GrGLCheckErr(IFACE, GR_FILE_AND_LINE_STR, #X) |
| #else |
| #define GR_GL_CHECK_ERROR_IMPL(IFACE, X) |
| #endif |
| |
| #if GR_GL_LOG_CALLS |
| extern bool gLogCallsGL; |
| #define GR_GL_LOG_CALLS_IMPL(X) \ |
| if (gLogCallsGL) \ |
| GrPrintf(GR_FILE_AND_LINE_STR "GL: " #X "\n") |
| #else |
| #define GR_GL_LOG_CALLS_IMPL(X) |
| #endif |
| |
| #if GR_GL_PER_GL_FUNC_CALLBACK |
| #define GR_GL_CALLBACK_IMPL(IFACE) (IFACE)->fCallback(IFACE) |
| #else |
| #define GR_GL_CALLBACK_IMPL(IFACE) |
| #endif |
| |
| #define GR_GL_CALL(IFACE, X) \ |
| do { \ |
| GR_GL_CALL_NOERRCHECK(IFACE, X); \ |
| GR_GL_CHECK_ERROR_IMPL(IFACE, X); \ |
| } while (false) |
| |
| #define GR_GL_CALL_NOERRCHECK(IFACE, X) \ |
| do { \ |
| GR_GL_CALLBACK_IMPL(IFACE); \ |
| (IFACE)->f##X; \ |
| GR_GL_LOG_CALLS_IMPL(X); \ |
| } while (false) |
| |
| #define GR_GL_CALL_RET(IFACE, RET, X) \ |
| do { \ |
| GR_GL_CALL_RET_NOERRCHECK(IFACE, RET, X); \ |
| GR_GL_CHECK_ERROR_IMPL(IFACE, X); \ |
| } while (false) |
| |
| #define GR_GL_CALL_RET_NOERRCHECK(IFACE, RET, X) \ |
| do { \ |
| GR_GL_CALLBACK_IMPL(IFACE); \ |
| (RET) = (IFACE)->f##X; \ |
| GR_GL_LOG_CALLS_IMPL(X); \ |
| } while (false) |
| |
| #define GR_GL_GET_ERROR(IFACE) (IFACE)->fGetError() |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * Some drivers want the var-int arg to be zero-initialized on input. |
| */ |
| #define GR_GL_INIT_ZERO 0 |
| #define GR_GL_GetIntegerv(gl, e, p) \ |
| do { \ |
| *(p) = GR_GL_INIT_ZERO; \ |
| GR_GL_CALL(gl, GetIntegerv(e, p)); \ |
| } while (0) |
| |
| #define GR_GL_GetFramebufferAttachmentParameteriv(gl, t, a, pname, p) \ |
| do { \ |
| *(p) = GR_GL_INIT_ZERO; \ |
| GR_GL_CALL(gl, GetFramebufferAttachmentParameteriv(t, a, pname, p)); \ |
| } while (0) |
| |
| #define GR_GL_GetRenderbufferParameteriv(gl, t, pname, p) \ |
| do { \ |
| *(p) = GR_GL_INIT_ZERO; \ |
| GR_GL_CALL(gl, GetRenderbufferParameteriv(t, pname, p)); \ |
| } while (0) |
| |
| #define GR_GL_GetTexLevelParameteriv(gl, t, l, pname, p) \ |
| do { \ |
| *(p) = GR_GL_INIT_ZERO; \ |
| GR_GL_CALL(gl, GetTexLevelParameteriv(t, l, pname, p)); \ |
| } while (0) |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| #endif |