diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/utils/mesa/SkEGLContext_Mesa.cpp | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/utils/mesa/SkEGLContext_Mesa.cpp b/src/utils/mesa/SkEGLContext_Mesa.cpp new file mode 100644 index 0000000000..ed1b7cd451 --- /dev/null +++ b/src/utils/mesa/SkEGLContext_Mesa.cpp @@ -0,0 +1,128 @@ +#include "SkEGLContext.h" +#include "SkTypes.h" + +#include "GL/osmesa.h" +#include "GL/glu.h" + +#define SK_GL_DECL_PROC(T, F) T F ## _func = NULL; +#define SK_GL_GET_PROC(T, F) F ## _func = (T)OSMesaGetProcAddress(#F); +#define SK_GL_GET_EXT_PROC(T, F) F ## _func = (T)OSMesaGetProcAddress(#F "EXT"); + +SkEGLContext::SkEGLContext() : context(NULL), image(NULL) { +} + +SkEGLContext::~SkEGLContext() { + if (this->image) + free(this->image); + + if (this->context) + OSMesaDestroyContext(this->context); +} + +#if SK_B32_SHIFT < SK_G32_SHIFT &&\ + SK_G32_SHIFT < SK_R32_SHIFT &&\ + SK_R32_SHIFT < SK_A32_SHIFT + #define SK_OSMESA_COLOR_ORDER OSMESA_BGRA +#elif SK_R32_SHIFT < SK_G32_SHIFT &&\ + SK_G32_SHIFT < SK_B32_SHIFT &&\ + SK_B32_SHIFT < SK_A32_SHIFT + #define SK_OSMESA_COLOR_ORDER OSMESA_RGBA +#elif SK_A32_SHIFT < SK_R32_SHIFT && \ + SK_R32_SHIFT < SK_G32_SHIFT && \ + SK_G32_SHIFT < SK_B32_SHIFT + #define SK_OSMESA_COLOR_ORDER OSMESA_ARGB +#else + //Color order (rgba) SK_R32_SHIFT SK_G32_SHIFT SK_B32_SHIFT SK_A32_SHIFT + #define SK_OSMESA_COLOR_ORDER OSMESA_RGBA +#endif + +bool SkEGLContext::init(const int width, const int height) { + /* Create an RGBA-mode context */ +#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305 + /* specify Z, stencil, accum sizes */ + OSMesaContext ctx = OSMesaCreateContextExt(SK_OSMESA_COLOR_ORDER, 16, 0, 0, NULL); +#else + OSMesaContext ctx = OSMesaCreateContext(SK_OSMESA_COLOR_ORDER, NULL); +#endif + if (!ctx) { + SkDebugf("OSMesaCreateContext failed!\n"); + return false; + } + this->context = ctx; + + // Allocate the image buffer + GLfloat *buffer = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); + if (!buffer) { + SkDebugf("Alloc image buffer failed!\n"); + return false; + } + this->image = buffer; + + // Bind the buffer to the context and make it current + if (!OSMesaMakeCurrent(ctx, buffer, GL_FLOAT, width, height)) { + SkDebugf("OSMesaMakeCurrent failed!\n"); + return false; + } + + //Setup the framebuffers + SK_GL_DECL_PROC(PFNGLGENFRAMEBUFFERSEXTPROC, glGenFramebuffers) + SK_GL_DECL_PROC(PFNGLBINDFRAMEBUFFEREXTPROC, glBindFramebuffer) + SK_GL_DECL_PROC(PFNGLGENRENDERBUFFERSPROC, glGenRenderbuffers) + SK_GL_DECL_PROC(PFNGLBINDRENDERBUFFERPROC, glBindRenderbuffer) + SK_GL_DECL_PROC(PFNGLRENDERBUFFERSTORAGEPROC, glRenderbufferStorage) + SK_GL_DECL_PROC(PFNGLFRAMEBUFFERRENDERBUFFERPROC, glFramebufferRenderbuffer) + SK_GL_DECL_PROC(PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC, glCheckFramebufferStatus) + + const GLubyte* glExts = glGetString(GL_EXTENSIONS); + if (gluCheckExtension( + reinterpret_cast<const GLubyte*>("GL_ARB_framebuffer_object") + , glExts)) + { + SK_GL_GET_PROC(PFNGLGENFRAMEBUFFERSEXTPROC, glGenFramebuffers) + SK_GL_GET_PROC(PFNGLBINDFRAMEBUFFEREXTPROC, glBindFramebuffer) + SK_GL_GET_PROC(PFNGLGENRENDERBUFFERSPROC, glGenRenderbuffers) + SK_GL_GET_PROC(PFNGLBINDRENDERBUFFERPROC, glBindRenderbuffer) + SK_GL_GET_PROC(PFNGLRENDERBUFFERSTORAGEPROC, glRenderbufferStorage) + SK_GL_GET_PROC(PFNGLFRAMEBUFFERRENDERBUFFERPROC, glFramebufferRenderbuffer) + SK_GL_GET_PROC(PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC, glCheckFramebufferStatus) + + //osmesa on mac currently only supports EXT + } else if (gluCheckExtension( + reinterpret_cast<const GLubyte*>("GL_EXT_framebuffer_object") + , glExts)) + { + SK_GL_GET_EXT_PROC(PFNGLGENFRAMEBUFFERSEXTPROC, glGenFramebuffers) + SK_GL_GET_EXT_PROC(PFNGLBINDFRAMEBUFFEREXTPROC, glBindFramebuffer) + SK_GL_GET_EXT_PROC(PFNGLGENRENDERBUFFERSPROC, glGenRenderbuffers) + SK_GL_GET_EXT_PROC(PFNGLBINDRENDERBUFFERPROC, glBindRenderbuffer) + SK_GL_GET_EXT_PROC(PFNGLRENDERBUFFERSTORAGEPROC, glRenderbufferStorage) + SK_GL_GET_EXT_PROC(PFNGLFRAMEBUFFERRENDERBUFFERPROC, glFramebufferRenderbuffer) + SK_GL_GET_EXT_PROC(PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC, glCheckFramebufferStatus) + } else { + SkDebugf("GL_ARB_framebuffer_object not found.\n"); + return false; + } + + GLuint fboID; + GLuint cbID; + GLuint dsID; + glGenFramebuffers_func(1, &fboID); + glBindFramebuffer_func(GL_FRAMEBUFFER, fboID); + + glGenRenderbuffers_func(1, &cbID); + glBindRenderbuffer_func(GL_RENDERBUFFER, cbID); + glRenderbufferStorage_func(GL_RENDERBUFFER, OSMESA_RGBA, width, height); + glFramebufferRenderbuffer_func(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, cbID); + + glGenRenderbuffers_func(1, &dsID); + glBindRenderbuffer_func(GL_RENDERBUFFER_EXT, dsID); + glRenderbufferStorage_func(GL_RENDERBUFFER, GL_STENCIL_INDEX8, width, height); + glFramebufferRenderbuffer_func(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, dsID); + + glViewport(0, 0, width, height); + glClearStencil(0); + glClear(GL_STENCIL_BUFFER_BIT); + + GLenum status = glCheckFramebufferStatus_func(GL_FRAMEBUFFER); + return GL_FRAMEBUFFER_COMPLETE == status; +} |