From e4b2356c07d31fbeeabb13b2fb47db703b473080 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Wed, 4 May 2005 20:11:35 +0000 Subject: Major check-in of changes for GL_EXT_framebuffer_object extension. Main driver impacts: - new code for creating the Mesa GLframebuffer - new span/pixel read/write code Some drivers not yet updated/tested. --- src/mesa/drivers/dri/common/drirenderbuffer.h | 39 +++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 src/mesa/drivers/dri/common/drirenderbuffer.h (limited to 'src/mesa/drivers/dri/common/drirenderbuffer.h') diff --git a/src/mesa/drivers/dri/common/drirenderbuffer.h b/src/mesa/drivers/dri/common/drirenderbuffer.h new file mode 100644 index 00000000000..627f1d41d98 --- /dev/null +++ b/src/mesa/drivers/dri/common/drirenderbuffer.h @@ -0,0 +1,39 @@ + +/** + * A driRenderbuffer is dervied from gl_renderbuffer. + * It describes a color buffer (front or back), a depth buffer, or stencil + * buffer etc. + * Specific to DRI drivers are the offset and pitch fields. + */ + + +#ifndef DRIRENDERBUFFER_H +#define DRIRENDERBUFFER_H + +#include "mtypes.h" + +typedef struct { + struct gl_renderbuffer Base; + + /* Chars or bytes per pixel. If Z and Stencil are stored together this + * will typically be 32 whether this a depth or stencil renderbuffer. + */ + GLint cpp; + + /* Buffer position and pitch (row stride). Recall that for today's DRI + * drivers, we have statically allocated color/depth/stencil buffers. + * So this information describes the whole screen, not just a window. + * To address pixels in a window, we need to know the window's position + * and size with respect to the screen. + */ + GLint offset; /* in bytes */ + GLint pitch; /* in pixels */ + +} driRenderbuffer; + + +driRenderbuffer * +driNewRenderbuffer(GLenum format, GLint cpp, GLint offset, GLint pitch); + + +#endif /* DRIRENDERBUFFER_H */ -- cgit v1.2.3