8895a7a0e2
Clean up GL vs Gr rect conventions for viewport and scissor. Review URL: http://codereview.appspot.com/4185056/ git-svn-id: http://skia.googlecode.com/svn/trunk@813 2bbb7eff-a529-9590-31e7-b0007b416f81
423 lines
15 KiB
C
423 lines
15 KiB
C
/*
|
|
Copyright 2010 Google Inc.
|
|
|
|
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.
|
|
*/
|
|
|
|
|
|
#ifndef GrGLConfig_DEFINED
|
|
#define GrGLConfig_DEFINED
|
|
|
|
#include "GrTypes.h"
|
|
|
|
#if !defined(GR_GL_CUSTOM_SETUP)
|
|
#define GR_GL_CUSTOM_SETUP 0
|
|
#endif
|
|
/**
|
|
* We need to pull in the right GL headers and determine whether we are
|
|
* compiling for ES1, ES2, or desktop GL. (We allow ES1 and ES2 to both be
|
|
* supported in the same build but not ESx and desktop). We also need to know
|
|
* the platform-specific way to get extension function pointers (e.g.
|
|
* eglGetProcAddress). The port specifies this info explicitly or we will infer
|
|
* it from the GR_*_BUILD flag.
|
|
*
|
|
* To specify GL setup directly define GR_GL_CUSTOM_SETUP to 1 and define:
|
|
* GR_SUPPORT_GLDESKTOP or (GR_SUPPORT_GLES1 and/or GR_SUPPORT_GLES2) to 1
|
|
*
|
|
* if GR_SUPPORT_GLDESKTOP is 1 then provide:
|
|
* 1. The name of your GL header in GR_INCLUDE_GLDESKTOP
|
|
* 2. If necessary, the name of a file that includes extension
|
|
* definitions in GR_INCLUDE_GLDESKTOPext.
|
|
* if GR_SUPPORT_GLES1 is 1 then provide:
|
|
* 1. The name of your GL header in GR_INCLUDE_GLES1
|
|
* 2. If necessary, the name of a file that includes extension
|
|
* definitions in GR_INCLUDE_GLES1ext.
|
|
* if GR_SUPPORT_GLES2 is 1 then provide:
|
|
* 1. The name of your GL header in GR_INCLUDE_GLES2
|
|
* 2. If necessary, the name of a file that includes extension
|
|
* definitions in GR_INCLUDE_GLES2ext.
|
|
*
|
|
* Optionally, define GR_GL_FUNC to any qualifier needed on GL function
|
|
* pointer declarations (e.g. __stdcall).
|
|
*
|
|
* Define GR_GL_PROC_ADDRESS to take a gl function and produce a
|
|
* function pointer. Two examples:
|
|
* 1. Your platform doesn't require a proc address function, just take
|
|
* the address of the function:
|
|
* #define GR_GL_PROC_ADDRESS(X) &X
|
|
* 2. Your platform uses eglGetProcAddress:
|
|
* #define GR_GL_PROC_ADDRESS eglGetProcAddress(#X)
|
|
*
|
|
* Optionally define GR_GL_PROC_ADDRESS_HEADER to include any additional
|
|
* header necessary to use GR_GL_PROC_ADDRESS (e.g. <EGL/egl.h>)
|
|
*
|
|
* Alternatively, define GR_GL_CUSTOM_SETUP_HEADER (and not GR_GL_CUSTOM_SETUP)
|
|
* to a header that can be included. This file should:
|
|
* 1. Define the approprate GR_SUPPORT_GL* macro(s) to 1
|
|
* 2. Includes all necessary GL headers.
|
|
* 3. Optionally define GR_GL_FUNC.
|
|
* 4. Define GR_GL_PROC_ADDRESS.
|
|
* 5. Optionally define GR_GL_PROC_ADDRESS_HEADER
|
|
*
|
|
*------------------------------------------------------------------------------
|
|
*
|
|
* 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). They don't require GR_GL_CUSTOM_SETUP or
|
|
* setup GR_GL_CUSTOM_SETUP_HEADER to be enabled:
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#if GR_GL_CUSTOM_SETUP
|
|
|
|
#ifdef GR_SUPPORT_GLES1
|
|
#include GR_INCLUDE_GLES1
|
|
#if defined(GR_INCLUDE_GLES1ext)
|
|
#include GR_INCLUDE_GLES1ext
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef GR_SUPPORT_GLES2
|
|
#include GR_INCLUDE_GLES2
|
|
#if defined(GR_INCLUDE_GLES2ext)
|
|
#include GR_INCLUDE_GLES2ext
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef GR_SUPPORT_GLDESKTOP
|
|
#include GR_INCLUDE_GLDESKTOP
|
|
#if defined(GR_INCLUDE_GLDESKTOPext)
|
|
#include GR_INCLUDE_GLDESKTOPext
|
|
#endif
|
|
#endif
|
|
|
|
#elif defined(GR_GL_CUSTOM_SETUP_HEADER)
|
|
|
|
#include GR_GL_CUSTOM_SETUP_HEADER
|
|
|
|
#else
|
|
#undef GR_GL_FUNC
|
|
#undef GR_GL_PROC_ADDRESS
|
|
#undef GR_GL_PROC_ADDRESS_HEADER
|
|
|
|
#if GR_WIN32_BUILD
|
|
#define GR_SUPPORT_GLDESKTOP 1
|
|
// glew has to be included before gl
|
|
#include <GL/glew.h>
|
|
#include <GL/gl.h>
|
|
// remove stupid windows defines
|
|
#undef near
|
|
#undef far
|
|
#define GR_GL_FUNC __stdcall
|
|
#define GR_GL_PROC_ADDRESS(X) wglGetProcAddress(#X)
|
|
#define GR_GL_PROC_ADDRESS_HEADER <windows.h>
|
|
#elif GR_MAC_BUILD
|
|
#define GR_SUPPORT_GLDESKTOP 1
|
|
#include <OpenGL/gl.h>
|
|
#include <OpenGL/glext.h>
|
|
#define GR_GL_PROC_ADDRESS(X) &X
|
|
#elif GR_IOS_BUILD
|
|
#define GR_SUPPORT_GLES1 1
|
|
#include <OpenGLES/ES1/gl.h>
|
|
#include <OpenGLES/ES1/glext.h>
|
|
#define GR_SUPPORT_GLES2 1
|
|
#include <OpenGLES/ES2/gl.h>
|
|
#include <OpenGLES/ES2/glext.h>
|
|
#define GR_GL_PROC_ADDRESS(X) &X
|
|
#elif GR_ANDROID_BUILD
|
|
#ifndef GL_GLEXT_PROTOTYPES
|
|
#define GL_GLEXT_PROTOTYPES
|
|
#endif
|
|
#define GR_SUPPORT_GLES2 1
|
|
#include <GLES2/gl2.h>
|
|
#include <GLES2/gl2ext.h>
|
|
#define GR_GL_PROC_ADDRESS(X) eglGetProcAddress(#X)
|
|
#define GR_GL_PROC_ADDRESS_HEADER <EGL/egl.h>
|
|
#elif GR_QNX_BUILD
|
|
#ifndef GL_GLEXT_PROTOTYPES
|
|
#define GL_GLEXT_PROTOTYPES
|
|
#endif
|
|
#define GR_SUPPORT_GLES2 1
|
|
// This is needed by the QNX GLES2 headers
|
|
#define GL_API_EXT
|
|
#include <GLES2/gl2.h>
|
|
#include <GLES2/gl2ext.h>
|
|
#define GR_GL_PROC_ADDRESS(X) eglGetProcAddress(#X)
|
|
#define GR_GL_PROC_ADDRESS_HEADER <EGL/egl.h>
|
|
#elif GR_LINUX_BUILD
|
|
#ifndef GL_GLEXT_PROTOTYPES
|
|
#define GL_GLEXT_PROTOTYPES
|
|
#endif
|
|
#define GL_EXT_framebuffer_blit 0
|
|
#include <GL/gl.h>
|
|
#include <GL/glext.h>
|
|
#define GR_GL_PROC_ADDRESS(X) &X
|
|
#define GR_SUPPORT_GLDESKTOP 1
|
|
#else
|
|
#error "unsupported GR_???_BUILD"
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#if !defined(GR_SUPPORT_GLDESKTOP)
|
|
#define GR_SUPPORT_GLDESKTOP 0
|
|
#endif
|
|
#if !defined(GR_SUPPORT_GLES1)
|
|
#define GR_SUPPORT_GLES1 0
|
|
#endif
|
|
#if !defined(GR_SUPPORT_GLES2)
|
|
#define GR_SUPPORT_GLES2 0
|
|
#endif
|
|
|
|
#define GR_SUPPORT_GLES ((GR_SUPPORT_GLES1) || (GR_SUPPORT_GLES2))
|
|
|
|
#if !GR_SUPPORT_GLES && !GR_SUPPORT_GLDESKTOP
|
|
#error "Either desktop or ES GL must be supported"
|
|
#elif GR_SUPPORT_GLES && GR_SUPPORT_GLDESKTOP
|
|
#error "Cannot support both desktop and ES GL"
|
|
#endif
|
|
|
|
#if !defined(GR_GL_FUNC)
|
|
#define GR_GL_FUNC
|
|
#endif
|
|
|
|
#if !defined(GR_GL_PROC_ADDRESS)
|
|
#error "Must define GR_GL_PROC_ADDRESS"
|
|
#endif
|
|
|
|
#if !defined(GR_GL_LOG_CALLS)
|
|
#define GR_GL_LOG_CALLS 0
|
|
#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 GR_SCALAR_IS_FIXED
|
|
#define GrGLType GL_FIXED
|
|
#elif GR_SCALAR_IS_FLOAT
|
|
#define GrGLType GL_FLOAT
|
|
#else
|
|
#error "unknown GR_SCALAR type"
|
|
#endif
|
|
|
|
#if GR_TEXT_SCALAR_IS_USHORT
|
|
#define GrGLTextType GL_UNSIGNED_SHORT
|
|
#define GR_GL_TEXT_TEXTURE_NORMALIZED 1
|
|
#elif GR_TEXT_SCALAR_IS_FLOAT
|
|
#define GrGLTextType GL_FLOAT
|
|
#define GR_GL_TEXT_TEXTURE_NORMALIZED 0
|
|
#elif GR_TEXT_SCALAR_IS_FIXED
|
|
#define GrGLTextType GL_FIXED
|
|
#define GR_GL_TEXT_TEXTURE_NORMALIZED 0
|
|
#else
|
|
#error "unknown GR_TEXT_SCALAR type"
|
|
#endif
|
|
|
|
// Pick a pixel config for 32bit bitmaps. Our default is GL_RGBA (expect on
|
|
// Windows where we match GDI's order).
|
|
#ifndef GR_GL_32BPP_COLOR_FORMAT
|
|
#if GR_WIN32_BUILD
|
|
#define GR_GL_32BPP_COLOR_FORMAT GR_BGRA //use GR prefix because this
|
|
#else //may be an extension.
|
|
#define GR_GL_32BPP_COLOR_FORMAT GL_RGBA
|
|
#endif
|
|
#endif
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// Setup for opengl ES/desktop extensions
|
|
// We make a struct of function pointers so that each GL context
|
|
// can have it's own struct. (Some environments may have different proc
|
|
// addresses for different contexts).
|
|
|
|
extern "C" {
|
|
struct GrGLExts {
|
|
// FBO
|
|
GLvoid (GR_GL_FUNC *GenFramebuffers)(GLsizei n, GLuint *framebuffers);
|
|
GLvoid (GR_GL_FUNC *BindFramebuffer)(GLenum target, GLuint framebuffer);
|
|
GLvoid (GR_GL_FUNC *FramebufferTexture2D)(GLenum target, GLenum attachment,
|
|
GLenum textarget, GLuint texture,
|
|
GLint level);
|
|
GLenum (GR_GL_FUNC *CheckFramebufferStatus)(GLenum target);
|
|
GLvoid (GR_GL_FUNC *DeleteFramebuffers)(GLsizei n, const
|
|
GLuint *framebuffers);
|
|
GLvoid (GR_GL_FUNC *RenderbufferStorage)(GLenum target,
|
|
GLenum internalformat,
|
|
GLsizei width, GLsizei height);
|
|
GLvoid (GR_GL_FUNC *GenRenderbuffers)(GLsizei n, GLuint *renderbuffers);
|
|
GLvoid (GR_GL_FUNC *DeleteRenderbuffers)(GLsizei n,
|
|
const GLuint *renderbuffers);
|
|
GLvoid (GR_GL_FUNC *FramebufferRenderbuffer)(GLenum target,
|
|
GLenum attachment,
|
|
GLenum renderbuffertarget,
|
|
GLuint renderbuffer);
|
|
GLvoid (GR_GL_FUNC *BindRenderbuffer)(GLenum target, GLuint renderbuffer);
|
|
|
|
// Multisampling
|
|
// same prototype for ARB_FBO, EXT_FBO, GL 3.0, & Apple ES extension
|
|
GLvoid (GR_GL_FUNC *RenderbufferStorageMultisample)(GLenum target,
|
|
GLsizei samples,
|
|
GLenum internalformat,
|
|
GLsizei width,
|
|
GLsizei height);
|
|
// desktop: ext_fbo_blit, arb_fbo, gl 3.0
|
|
GLvoid (GR_GL_FUNC *BlitFramebuffer)(GLint srcX0, GLint srcY0,
|
|
GLint srcX1, GLint srcY1,
|
|
GLint dstX0, GLint dstY0,
|
|
GLint dstX1, GLint dstY1,
|
|
GLbitfield mask, GLenum filter);
|
|
// apple's es extension
|
|
GLvoid (GR_GL_FUNC *ResolveMultisampleFramebuffer)();
|
|
|
|
// IMG'e es extension
|
|
GLvoid (GR_GL_FUNC *FramebufferTexture2DMultisample)(GLenum target,
|
|
GLenum attachment,
|
|
GLenum textarget,
|
|
GLuint texture,
|
|
GLint level,
|
|
GLsizei samples);
|
|
|
|
// Buffer mapping (extension in ES).
|
|
GLvoid* (GR_GL_FUNC *MapBuffer)(GLenum target, GLenum access);
|
|
GLboolean (GR_GL_FUNC *UnmapBuffer)(GLenum target);
|
|
};
|
|
}
|
|
|
|
// BGRA format
|
|
|
|
#define GR_BGRA 0x80E1
|
|
|
|
// FBO / stencil formats
|
|
#define GR_FRAMEBUFFER 0x8D40
|
|
#define GR_FRAMEBUFFER_COMPLETE 0x8CD5
|
|
#define GR_COLOR_ATTACHMENT0 0x8CE0
|
|
#define GR_FRAMEBUFFER_BINDING 0x8CA6
|
|
#define GR_RENDERBUFFER 0x8D41
|
|
#define GR_STENCIL_ATTACHMENT 0x8D20
|
|
#define GR_STENCIL_INDEX4 0x8D47
|
|
#define GR_STENCIL_INDEX8 0x8D48
|
|
#define GR_STENCIL_INDEX16 0x8D49
|
|
#define GR_DEPTH24_STENCIL8 0x88F0
|
|
#define GR_MAX_RENDERBUFFER_SIZE 0x84E8
|
|
#define GR_DEPTH_STENCIL_ATTACHMENT 0x821A
|
|
#define GR_DEPTH_STENCIL 0x84F9
|
|
#define GR_RGBA8 0x8058
|
|
#define GR_RGB565 0x8D62
|
|
|
|
|
|
// Multisampling
|
|
|
|
// IMG MAX_SAMPLES uses a different value than desktop, Apple ES extension.
|
|
#define GR_MAX_SAMPLES 0x8D57
|
|
#define GR_MAX_SAMPLES_IMG 0x9135
|
|
#define GR_READ_FRAMEBUFFER 0x8CA8
|
|
#define GR_DRAW_FRAMEBUFFER 0x8CA9
|
|
|
|
// Buffer mapping
|
|
#define GR_WRITE_ONLY 0x88B9
|
|
#define GR_BUFFER_MAPPED 0x88BC
|
|
|
|
// Palette texture
|
|
#define GR_PALETTE8_RGBA8 0x8B91
|
|
|
|
extern void GrGLInitExtensions(GrGLExts* exts);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
extern void GrGLCheckErr(const char* location, const char* call);
|
|
|
|
static inline void GrGLClearErr() {
|
|
while (GL_NO_ERROR != glGetError()) {}
|
|
}
|
|
|
|
#if GR_GL_CHECK_ERROR
|
|
extern bool gCheckErrorGL;
|
|
#define GR_GL_CHECK_ERROR_IMPL(X) if (gCheckErrorGL) GrGLCheckErr(GR_FILE_AND_LINE_STR, #X)
|
|
#else
|
|
#define GR_GL_CHECK_ERROR_IMPL(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
|
|
|
|
#define GR_GL(X) gl ## X; GR_GL_LOG_CALLS_IMPL(X); GR_GL_CHECK_ERROR_IMPL(X);
|
|
#define GR_GL_NO_ERR(X) GrGLClearErr(); gl ## X; GR_GL_LOG_CALLS_IMPL(X); GR_GL_CHECK_ERROR_IMPL(X);
|
|
#define GR_GLEXT(exts, X) exts. X; GR_GL_LOG_CALLS_IMPL(X); GR_GL_CHECK_ERROR_IMPL(X);
|
|
#define GR_GLEXT_NO_ERR(exts, X) GrGLClearErr(); exts. X; GR_GL_LOG_CALLS_IMPL(X); GR_GL_CHECK_ERROR_IMPL(X);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
/**
|
|
* Helpers for glGetString()
|
|
*/
|
|
bool has_gl_extension(const char* ext);
|
|
void gl_version(int* major, int* minor);
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
/**
|
|
* GrGL_RestoreResetRowLength() will reset GL_UNPACK_ROW_LENGTH to 0. We write
|
|
* this wrapper, since GL_UNPACK_ROW_LENGTH is not available on all GL versions
|
|
*/
|
|
#if GR_SUPPORT_GLDESKTOP
|
|
static inline void GrGL_RestoreResetRowLength() {
|
|
GR_GL(PixelStorei(GL_UNPACK_ROW_LENGTH, 0));
|
|
}
|
|
#else
|
|
#define GrGL_RestoreResetRowLength()
|
|
#endif
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
/**
|
|
* Some drivers want the var-int arg to be zero-initialized on input.
|
|
*/
|
|
#define GR_GL_INIT_ZERO 0
|
|
#define GR_GL_GetIntegerv(e, p) \
|
|
do { \
|
|
*(p) = GR_GL_INIT_ZERO; \
|
|
GR_GL(GetIntegerv(e, p)); \
|
|
} while (0)
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#endif |