/*
* Mesa 3-D graphics library
- * Version: 6.1
+ * Version: 6.3
*
- * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
#include "glheader.h"
-#include "imports.h"
#include "buffers.h"
#include "colormac.h"
#include "context.h"
-#include "depth.h"
#include "enums.h"
-#include "stencil.h"
+#include "fbobject.h"
#include "state.h"
-#include "mtypes.h"
+
+
+#define BAD_MASK ~0u
#if _HAVE_FULL_GL
_mesa_update_state( ctx ); /* update _Xmin, etc */
}
- if (ctx->RenderMode==GL_RENDER) {
+ if (ctx->RenderMode == GL_RENDER) {
const GLint x = ctx->DrawBuffer->_Xmin;
const GLint y = ctx->DrawBuffer->_Ymin;
const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
- GLbitfield ddMask;
+ GLbitfield bufferMask;
/* don't clear depth buffer if depth writing disabled */
if (!ctx->Depth.Mask)
/* Build the bitmask to send to device driver's Clear function.
* Note that the GL_COLOR_BUFFER_BIT flag will expand to 0, 1, 2 or 4
- * of the FRONT/BACK_LEFT/RIGHT_BIT flags.
+ * of the BUFFER_BIT_FRONT/BACK_LEFT/RIGHT flags, or one of the
+ * BUFFER_BIT_COLORn flags.
*/
- ddMask = 0;
- if (mask & GL_COLOR_BUFFER_BIT)
- ddMask |= ctx->Color._DrawDestMask[0];
- if ((mask & GL_DEPTH_BUFFER_BIT) && ctx->Visual.depthBits > 0)
- ddMask |= GL_DEPTH_BUFFER_BIT;
- if ((mask & GL_STENCIL_BUFFER_BIT) && ctx->Visual.stencilBits > 0)
- ddMask |= GL_STENCIL_BUFFER_BIT;
- if ((mask & GL_ACCUM_BUFFER_BIT) && ctx->Visual.accumRedBits > 0)
- ddMask |= GL_ACCUM_BUFFER_BIT;
+ bufferMask = 0;
+ if (mask & GL_COLOR_BUFFER_BIT) {
+ bufferMask |= ctx->DrawBuffer->_ColorDrawBufferMask[0];
+ }
+
+ if ((mask & GL_DEPTH_BUFFER_BIT)
+ && ctx->DrawBuffer->Visual.haveDepthBuffer) {
+ bufferMask |= BUFFER_BIT_DEPTH;
+ }
+
+ if ((mask & GL_STENCIL_BUFFER_BIT)
+ && ctx->DrawBuffer->Visual.haveStencilBuffer) {
+ bufferMask |= BUFFER_BIT_STENCIL;
+ }
+
+ if ((mask & GL_ACCUM_BUFFER_BIT)
+ && ctx->DrawBuffer->Visual.haveAccumBuffer) {
+ bufferMask |= BUFFER_BIT_ACCUM;
+ }
ASSERT(ctx->Driver.Clear);
- ctx->Driver.Clear( ctx, ddMask, (GLboolean) !ctx->Scissor.Enabled,
+ ctx->Driver.Clear( ctx, bufferMask, (GLboolean) !ctx->Scissor.Enabled,
x, y, width, height );
}
}
/**
- * Return bitmask of DD_* flags indicating which color buffers are
- * available to the rendering context;
+ * Return bitmask of BUFFER_BIT_* flags indicating which color buffers are
+ * available to the rendering context.
+ * This depends on the framebuffer we're writing to. For window system
+ * framebuffers we look at the framebuffer's visual. But for user-
+ * create framebuffers we look at the number of supported color attachments.
*/
static GLuint
-supported_buffer_bitmask(const GLcontext *ctx)
+supported_buffer_bitmask(const GLcontext *ctx, GLuint framebufferID)
{
- GLuint mask = DD_FRONT_LEFT_BIT; /* always have this */
+ GLuint mask = 0x0;
GLint i;
- if (ctx->Visual.stereoMode) {
- mask |= DD_FRONT_RIGHT_BIT;
- if (ctx->Visual.doubleBufferMode) {
- mask |= DD_BACK_LEFT_BIT | DD_BACK_RIGHT_BIT;
+ if (framebufferID > 0) {
+ /* A user-created renderbuffer */
+ ASSERT(ctx->Extensions.EXT_framebuffer_object);
+ for (i = 0; i < ctx->Const.MaxColorAttachments; i++) {
+ mask |= (BUFFER_BIT_COLOR0 << i);
}
}
- else if (ctx->Visual.doubleBufferMode) {
- mask |= DD_BACK_LEFT_BIT;
- }
+ else {
+ /* A window system renderbuffer */
+ mask = BUFFER_BIT_FRONT_LEFT; /* always have this */
+ if (ctx->Visual.stereoMode) {
+ mask |= BUFFER_BIT_FRONT_RIGHT;
+ if (ctx->Visual.doubleBufferMode) {
+ mask |= BUFFER_BIT_BACK_LEFT | BUFFER_BIT_BACK_RIGHT;
+ }
+ }
+ else if (ctx->Visual.doubleBufferMode) {
+ mask |= BUFFER_BIT_BACK_LEFT;
+ }
- for (i = 0; i < ctx->Visual.numAuxBuffers; i++) {
- mask |= (DD_AUX0_BIT << i);
+ for (i = 0; i < ctx->Visual.numAuxBuffers; i++) {
+ mask |= (BUFFER_BIT_AUX0 << i);
+ }
}
return mask;
/**
* Helper routine used by glDrawBuffer and glDrawBuffersARB.
- * Given a GLenum naming (a) color buffer(s), return the corresponding
- * bitmask of DD_* flags.
+ * Given a GLenum naming one or more color buffers (such as
+ * GL_FRONT_AND_BACK), return the corresponding bitmask of BUFFER_BIT_* flags.
*/
static GLuint
draw_buffer_enum_to_bitmask(GLenum buffer)
{
switch (buffer) {
- case GL_FRONT:
- return DD_FRONT_LEFT_BIT | DD_FRONT_RIGHT_BIT;
- case GL_BACK:
- return DD_BACK_LEFT_BIT | DD_BACK_RIGHT_BIT;
case GL_NONE:
return 0;
+ case GL_FRONT:
+ return BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_FRONT_RIGHT;
+ case GL_BACK:
+ return BUFFER_BIT_BACK_LEFT | BUFFER_BIT_BACK_RIGHT;
case GL_RIGHT:
- return DD_FRONT_RIGHT_BIT | DD_BACK_RIGHT_BIT;
+ return BUFFER_BIT_FRONT_RIGHT | BUFFER_BIT_BACK_RIGHT;
case GL_FRONT_RIGHT:
- return DD_FRONT_RIGHT_BIT;
+ return BUFFER_BIT_FRONT_RIGHT;
case GL_BACK_RIGHT:
- return DD_BACK_RIGHT_BIT;
+ return BUFFER_BIT_BACK_RIGHT;
case GL_BACK_LEFT:
- return DD_BACK_LEFT_BIT;
+ return BUFFER_BIT_BACK_LEFT;
case GL_FRONT_AND_BACK:
- return DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT
- | DD_FRONT_RIGHT_BIT | DD_BACK_RIGHT_BIT;
+ return BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_BACK_LEFT
+ | BUFFER_BIT_FRONT_RIGHT | BUFFER_BIT_BACK_RIGHT;
case GL_LEFT:
- return DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT;
+ return BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_BACK_LEFT;
case GL_FRONT_LEFT:
- return DD_FRONT_LEFT_BIT;
+ return BUFFER_BIT_FRONT_LEFT;
case GL_AUX0:
- return DD_AUX0_BIT;
+ return BUFFER_BIT_AUX0;
case GL_AUX1:
- return DD_AUX1_BIT;
+ return BUFFER_BIT_AUX1;
case GL_AUX2:
- return DD_AUX2_BIT;
+ return BUFFER_BIT_AUX2;
case GL_AUX3:
- return DD_AUX3_BIT;
+ return BUFFER_BIT_AUX3;
+ case GL_COLOR_ATTACHMENT0_EXT:
+ return BUFFER_BIT_COLOR0;
+ case GL_COLOR_ATTACHMENT1_EXT:
+ return BUFFER_BIT_COLOR1;
+ case GL_COLOR_ATTACHMENT2_EXT:
+ return BUFFER_BIT_COLOR2;
+ case GL_COLOR_ATTACHMENT3_EXT:
+ return BUFFER_BIT_COLOR3;
default:
/* error */
- return ~0;
+ return BAD_MASK;
}
}
{
switch (buffer) {
case GL_FRONT:
- return DD_FRONT_LEFT_BIT;
+ return BUFFER_BIT_FRONT_LEFT;
case GL_BACK:
- return DD_BACK_LEFT_BIT;
+ return BUFFER_BIT_BACK_LEFT;
case GL_RIGHT:
- return DD_FRONT_RIGHT_BIT;
+ return BUFFER_BIT_FRONT_RIGHT;
case GL_FRONT_RIGHT:
- return DD_FRONT_RIGHT_BIT;
+ return BUFFER_BIT_FRONT_RIGHT;
case GL_BACK_RIGHT:
- return DD_BACK_RIGHT_BIT;
+ return BUFFER_BIT_BACK_RIGHT;
case GL_BACK_LEFT:
- return DD_BACK_LEFT_BIT;
+ return BUFFER_BIT_BACK_LEFT;
case GL_LEFT:
- return DD_FRONT_LEFT_BIT;
+ return BUFFER_BIT_FRONT_LEFT;
case GL_FRONT_LEFT:
- return DD_FRONT_LEFT_BIT;
+ return BUFFER_BIT_FRONT_LEFT;
case GL_AUX0:
- return DD_AUX0_BIT;
+ return BUFFER_BIT_AUX0;
case GL_AUX1:
- return DD_AUX1_BIT;
+ return BUFFER_BIT_AUX1;
case GL_AUX2:
- return DD_AUX2_BIT;
+ return BUFFER_BIT_AUX2;
case GL_AUX3:
- return DD_AUX3_BIT;
+ return BUFFER_BIT_AUX3;
+ case GL_COLOR_ATTACHMENT0_EXT:
+ return BUFFER_BIT_COLOR0;
+ case GL_COLOR_ATTACHMENT1_EXT:
+ return BUFFER_BIT_COLOR1;
+ case GL_COLOR_ATTACHMENT2_EXT:
+ return BUFFER_BIT_COLOR2;
+ case GL_COLOR_ATTACHMENT3_EXT:
+ return BUFFER_BIT_COLOR3;
default:
/* error */
- return ~0;
+ return BAD_MASK;
}
}
-
/**
* Specify which color buffers to draw into.
*
- * \param mode color buffer combination.
- *
- * \sa glDrawBuffer().
+ * \param buffer color buffer, such as GL_LEFT or GL_FRONT_AND_BACK.
*
* Flushes the vertices and verifies the parameter and updates the
* gl_colorbuffer_attrib::_DrawDestMask bitfield. Marks new color state in
* dd_function_table::DrawBuffer callback.
*/
void GLAPIENTRY
-_mesa_DrawBuffer( GLenum mode )
+_mesa_DrawBuffer(GLenum buffer)
{
- GLenum destMask, supportedMask;
+ GLuint bufferID;
+ GLuint destMask;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* too complex... */
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glDrawBuffer %s\n", _mesa_lookup_enum_by_nr(mode));
-
- /*
- * Do error checking and compute the _DrawDestMask bitfield.
- */
- destMask = draw_buffer_enum_to_bitmask(mode);
- if (destMask == ~0u) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glDrawBuffer(mode)");
- return;
+ if (MESA_VERBOSE & VERBOSE_API) {
+ _mesa_debug(ctx, "glDrawBuffer %s\n", _mesa_lookup_enum_by_nr(buffer));
}
- supportedMask = supported_buffer_bitmask(ctx);
- destMask &= supportedMask;
+ bufferID = ctx->DrawBuffer->Name;
- if (destMask == 0) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffer(mode)");
- return;
+ if (buffer == GL_NONE) {
+ destMask = 0x0;
+ }
+ else {
+ const GLuint supportedMask = supported_buffer_bitmask(ctx, bufferID);
+ destMask = draw_buffer_enum_to_bitmask(buffer);
+ if (destMask == BAD_MASK) {
+ /* totally bogus buffer */
+ _mesa_error(ctx, GL_INVALID_ENUM, "glDrawBuffer(buffer)");
+ return;
+ }
+ destMask &= supportedMask;
+ if (destMask == 0x0) {
+ /* none of the named color buffers exist! */
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffer(buffer)");
+ return;
+ }
}
- ctx->Color.DrawBuffer[0] = mode;
- ctx->Color._DrawDestMask[0] = destMask;
- ctx->NewState |= _NEW_COLOR;
-
- /*
- * Call device driver function.
- */
- if (ctx->Driver.DrawBuffer)
- (*ctx->Driver.DrawBuffer)(ctx, mode);
+ /* if we get here, there's no error so set new state */
+ _mesa_drawbuffers(ctx, 1, &buffer, &destMask);
}
/**
* Called by glDrawBuffersARB; specifies the destination color buffers
* for N fragment program color outputs.
+ *
+ * XXX This function is called by _mesa_PopAttrib() and we need to do
+ * some more work to deal with the current framebuffer binding state!
*/
void GLAPIENTRY
_mesa_DrawBuffersARB(GLsizei n, const GLenum *buffers)
{
- GLint i;
+ GLint output;
GLuint usedBufferMask, supportedMask;
+ GLuint bufferID;
+ GLuint destMask[MAX_DRAW_BUFFERS];
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+ if (!ctx->Extensions.ARB_draw_buffers) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffersARB");
+ return;
+ }
if (n < 1 || n > (GLsizei) ctx->Const.MaxDrawBuffers) {
- _mesa_error(ctx, GL_INVALID_VALUE, "glDrawBuffersARB(n)" );
+ _mesa_error(ctx, GL_INVALID_VALUE, "glDrawBuffersARB(n)");
return;
}
- supportedMask = supported_buffer_bitmask(ctx);
- usedBufferMask = 0;
- for (i = 0; i < n; i++) {
- GLuint destMask = draw_buffer_enum_to_bitmask(buffers[i]);
- if (destMask == ~0u ) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glDrawBuffersARB(buffer)");
- return;
- }
- destMask &= supportedMask;
- if (destMask == 0) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glDrawBuffersARB(unsupported buffer)");
- return;
+ bufferID = ctx->DrawBuffer->Name;
+
+ supportedMask = supported_buffer_bitmask(ctx, bufferID);
+ usedBufferMask = 0x0;
+
+ /* complicated error checking... */
+ for (output = 0; output < n; output++) {
+ if (buffers[output] == GL_NONE) {
+ destMask[output] = 0x0;
}
- if (destMask & usedBufferMask) {
- /* can't use a dest buffer more than once! */
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glDrawBuffersARB(duplicated buffer)");
- return;
+ else {
+ destMask[output] = draw_buffer_enum_to_bitmask(buffers[output]);
+ if (destMask[output] == BAD_MASK
+ || _mesa_bitcount(destMask[output]) > 1) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glDrawBuffersARB(buffer)");
+ return;
+ }
+ destMask[output] &= supportedMask;
+ if (destMask[output] == 0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glDrawBuffersARB(unsupported buffer)");
+ return;
+ }
+ if (destMask[output] & usedBufferMask) {
+ /* can't specify a dest buffer more than once! */
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glDrawBuffersARB(duplicated buffer)");
+ return;
+ }
+
+ /* update bitmask */
+ usedBufferMask |= destMask[output];
+ }
+ }
+
+ /* OK, if we get here, there were no errors so set the new state */
+ _mesa_drawbuffers(ctx, n, buffers, destMask);
+}
+
+
+/**
+ * Set color output state. Traditionally, there was only one color
+ * output, but fragment programs can now have several distinct color
+ * outputs (see GL_ARB_draw_buffers). This function sets the state
+ * for one such color output.
+ */
+static void
+set_color_output(GLcontext *ctx, GLuint output, GLenum buffer, GLuint destMask)
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+
+ ASSERT(output < ctx->Const.MaxDrawBuffers);
+
+ fb->ColorDrawBuffer[output] = buffer;
+ fb->_ColorDrawBufferMask[output] = destMask;
+
+ if (fb->Name == 0) {
+ /* Set traditional state var */
+ ctx->Color.DrawBuffer[output] = buffer;
+ }
+
+ /* not really needed, will be set later */
+ fb->_NumColorDrawBuffers[output] = 0;
+}
+
+
+/**
+ * Helper routine used by _mesa_DrawBuffer, _mesa_DrawBuffersARB and
+ * _mesa_PopAttrib to set drawbuffer state.
+ */
+void
+_mesa_drawbuffers(GLcontext *ctx, GLsizei n, const GLenum *buffers,
+ const GLuint *destMask)
+{
+ GLuint mask[MAX_DRAW_BUFFERS];
+ GLint output;
+
+ if (!destMask) {
+ /* compute destMask values now */
+ const GLuint bufferID = ctx->DrawBuffer->Name;
+ const GLuint supportedMask = supported_buffer_bitmask(ctx, bufferID);
+ for (output = 0; output < n; output++) {
+ mask[output] = draw_buffer_enum_to_bitmask(buffers[output]);
+ ASSERT(mask[output] != BAD_MASK);
+ mask[output] &= supportedMask;
}
- /* update bitmask */
- usedBufferMask |= destMask;
- /* save state */
- ctx->Color.DrawBuffer[i] = buffers[i];
- ctx->Color._DrawDestMask[i] = destMask;
+ destMask = mask;
+ }
+
+ for (output = 0; output < n; output++) {
+ set_color_output(ctx, output, buffers[output], destMask[output]);
+ }
+
+ /* set remaining color outputs to NONE */
+ for (output = n; output < ctx->Const.MaxDrawBuffers; output++) {
+ set_color_output(ctx, output, GL_NONE, 0x0);
}
ctx->NewState |= _NEW_COLOR;
* Call device driver function.
*/
if (ctx->Driver.DrawBuffers)
- (*ctx->Driver.DrawBuffers)(ctx, n, buffers);
+ ctx->Driver.DrawBuffers(ctx, n, buffers);
+ else if (ctx->Driver.DrawBuffer)
+ ctx->Driver.DrawBuffer(ctx, buffers[0]);
}
+
/**
* Set the color buffer source for reading pixels.
*
*
* \sa glReadBuffer().
*
- * Verifies the parameter and updates gl_pixel_attrib::_ReadSrcMask. Marks
- * new pixel state in __GLcontextRec::NewState and notifies the driver via
- * dd_function_table::ReadBuffer.
*/
void GLAPIENTRY
-_mesa_ReadBuffer( GLenum mode )
+_mesa_ReadBuffer(GLenum buffer)
{
+ struct gl_framebuffer *fb;
GLuint srcMask, supportedMask;
+ GLuint bufferID;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+ fb = ctx->ReadBuffer;
+ bufferID = fb->Name;
+
if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glReadBuffer %s\n", _mesa_lookup_enum_by_nr(mode));
+ _mesa_debug(ctx, "glReadBuffer %s\n", _mesa_lookup_enum_by_nr(buffer));
- srcMask = read_buffer_enum_to_bitmask(mode);
- if (srcMask == ~0u) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glReadBuffer(mode)");
- return;
+ if (bufferID > 0 && buffer == GL_NONE) {
+ /* legal! */
+ srcMask = 0x0;
}
- supportedMask = supported_buffer_bitmask(ctx);
- if ((srcMask & supportedMask) == 0) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glReadBuffer(mode)");
- return;
+ else {
+ /* general case */
+ srcMask = read_buffer_enum_to_bitmask(buffer);
+ if (srcMask == BAD_MASK) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glReadBuffer(buffer)");
+ return;
+ }
+ supportedMask = supported_buffer_bitmask(ctx, bufferID);
+ if ((srcMask & supportedMask) == 0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glReadBuffer(buffer)");
+ return;
+ }
+ }
+
+ if (bufferID == 0) {
+ ctx->Pixel.ReadBuffer = buffer;
}
- ctx->Pixel._ReadSrcMask = srcMask;
- ctx->Pixel.ReadBuffer = mode;
+ fb->ColorReadBuffer = buffer;
+ fb->_ColorReadBufferMask = srcMask;
+
ctx->NewState |= _NEW_PIXEL;
/*
* Call device driver function.
*/
if (ctx->Driver.ReadBuffer)
- (*ctx->Driver.ReadBuffer)(ctx, mode);
+ (*ctx->Driver.ReadBuffer)(ctx, buffer);
}
* \note This function may be called from within Mesa or called by the
* user directly (see the GL_MESA_resize_buffers extension).
*/
+#if OLD_RENDERBUFFER
+/* THIS FUNCTION IS OBSOLETE!!!
+ * See _mesa_resize_framebuffer
+ */
+#endif
void GLAPIENTRY
_mesa_ResizeBuffersMESA( void )
{
GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx );
+
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glResizeBuffersMESA\n");
- if (ctx) {
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx );
-
- if (ctx->DrawBuffer) {
- GLuint buf_width, buf_height;
- GLframebuffer *buffer = ctx->DrawBuffer;
-
- /* ask device driver for size of output buffer */
- (*ctx->Driver.GetBufferSize)( buffer, &buf_width, &buf_height );
-
- /* see if size of device driver's color buffer (window) has changed */
- if (buffer->Width == buf_width && buffer->Height == buf_height)
- return; /* size is as expected */
+ if (ctx->DrawBuffer && ctx->DrawBuffer->Name == 0) {
+ GLuint newWidth, newHeight;
+ GLframebuffer *buffer = ctx->DrawBuffer;
- buffer->Width = buf_width;
- buffer->Height = buf_height;
+ /* ask device driver for size of output buffer */
+ ctx->Driver.GetBufferSize( buffer, &newWidth, &newHeight );
- ctx->Driver.ResizeBuffers( buffer );
+ /* see if size of device driver's color buffer (window) has changed */
+ if (buffer->Width != newWidth || buffer->Height != newHeight) {
+ if (ctx->Driver.ResizeBuffers)
+ ctx->Driver.ResizeBuffers(ctx, buffer, newWidth, newHeight );
}
+ }
- if (ctx->ReadBuffer && ctx->ReadBuffer != ctx->DrawBuffer) {
- GLuint buf_width, buf_height;
- GLframebuffer *buffer = ctx->ReadBuffer;
-
- /* ask device driver for size of read buffer */
- (*ctx->Driver.GetBufferSize)( buffer, &buf_width, &buf_height );
-
- /* see if size of device driver's color buffer (window) has changed */
- if (buffer->Width == buf_width && buffer->Height == buf_height)
- return; /* size is as expected */
+ if (ctx->ReadBuffer && ctx->ReadBuffer != ctx->DrawBuffer
+ && ctx->ReadBuffer->Name == 0) {
+ GLuint newWidth, newHeight;
+ GLframebuffer *buffer = ctx->ReadBuffer;
- buffer->Width = buf_width;
- buffer->Height = buf_height;
+ /* ask device driver for size of read buffer */
+ ctx->Driver.GetBufferSize( buffer, &newWidth, &newHeight );
- ctx->Driver.ResizeBuffers( buffer );
+ /* see if size of device driver's color buffer (window) has changed */
+ if (buffer->Width != newWidth || buffer->Height != newHeight) {
+ if (ctx->Driver.ResizeBuffers)
+ ctx->Driver.ResizeBuffers(ctx, buffer, newWidth, newHeight );
}
-
- ctx->NewState |= _NEW_BUFFERS; /* to update scissor / window bounds */
}
+
+ ctx->NewState |= _NEW_BUFFERS; /* to update scissor / window bounds */
}
-/**********************************************************************/
-/** \name State management */
-/*@{*/
-
-/**
- * Update screen bounds.
- *
- * \param ctx GL context.
- *
- * Update gl_frame_buffer::_Xmin, and etc.
- */
-void _mesa_update_buffers( GLcontext *ctx )
-{
- ctx->DrawBuffer->_Xmin = 0;
- ctx->DrawBuffer->_Ymin = 0;
- ctx->DrawBuffer->_Xmax = ctx->DrawBuffer->Width;
- ctx->DrawBuffer->_Ymax = ctx->DrawBuffer->Height;
- if (ctx->Scissor.Enabled) {
- if (ctx->Scissor.X > ctx->DrawBuffer->_Xmin) {
- ctx->DrawBuffer->_Xmin = ctx->Scissor.X;
- }
- if (ctx->Scissor.Y > ctx->DrawBuffer->_Ymin) {
- ctx->DrawBuffer->_Ymin = ctx->Scissor.Y;
- }
- if (ctx->Scissor.X + ctx->Scissor.Width < ctx->DrawBuffer->_Xmax) {
- ctx->DrawBuffer->_Xmax = ctx->Scissor.X + ctx->Scissor.Width;
- }
- if (ctx->Scissor.Y + ctx->Scissor.Height < ctx->DrawBuffer->_Ymax) {
- ctx->DrawBuffer->_Ymax = ctx->Scissor.Y + ctx->Scissor.Height;
- }
- }
-}
-
-/*@}*/
-
-
/**********************************************************************/
/** \name Initialization */
/*@{*/
/**
- * Initialize the context scissor data.
- *
- * \param ctx GL context.
- *
- * Initializes the __GLcontextRec::Scissor and __GLcontextRec::Multisample
- * attribute groups, and related constants in __GLcontextRec::Const.
+ * Initialize the context's scissor state.
+ * \param ctx the GL context.
*/
-void _mesa_init_buffers( GLcontext * ctx )
+void
+_mesa_init_scissor(GLcontext *ctx)
{
/* Scissor group */
ctx->Scissor.Enabled = GL_FALSE;
ctx->Scissor.Y = 0;
ctx->Scissor.Width = 0;
ctx->Scissor.Height = 0;
+}
- /* Multisample */
+
+/**
+ * Initialize the context's multisample state.
+ * \param ctx the GL context.
+ */
+void
+_mesa_init_multisample(GLcontext *ctx)
+{
ctx->Multisample.Enabled = GL_FALSE;
ctx->Multisample.SampleAlphaToCoverage = GL_FALSE;
ctx->Multisample.SampleAlphaToOne = GL_FALSE;
ctx->Multisample.SampleCoverage = GL_FALSE;
ctx->Multisample.SampleCoverageValue = 1.0;
ctx->Multisample.SampleCoverageInvert = GL_FALSE;
-
}
/*@}*/
projects / mesa.git / blobdiff