/*
* Mesa 3-D graphics library
- * Version: 6.5.1
+ * Version: 7.2
*
- * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2008 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 "buffers.h"
#include "context.h"
#include "depthstencil.h"
+#include "enums.h"
+#include "formats.h"
+#include "macros.h"
#include "mtypes.h"
#include "fbobject.h"
#include "framebuffer.h"
fb->_DepthMaxF = (GLfloat) fb->_DepthMax;
/* Minimum resolvable depth value, for polygon offset */
- fb->_MRD = 1.0 / fb->_DepthMaxF;
+ fb->_MRD = (GLfloat)1.0 / fb->_DepthMaxF;
}
-
/**
* Create and initialize a gl_framebuffer object.
* This is intended for creating _window_system_ framebuffers, not generic
* \sa _mesa_new_framebuffer
*/
struct gl_framebuffer *
-_mesa_create_framebuffer(const GLvisual *visual)
+_mesa_create_framebuffer(const struct gl_config *visual)
{
struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
assert(visual);
if (fb) {
- _mesa_initialize_framebuffer(fb, visual);
+ _mesa_initialize_window_framebuffer(fb, visual);
}
return fb;
}
* \sa _mesa_create_framebuffer
*/
struct gl_framebuffer *
-_mesa_new_framebuffer(GLcontext *ctx, GLuint name)
+_mesa_new_framebuffer(struct gl_context *ctx, GLuint name)
{
struct gl_framebuffer *fb;
(void) ctx;
assert(name != 0);
fb = CALLOC_STRUCT(gl_framebuffer);
if (fb) {
- fb->Name = name;
- fb->RefCount = 1;
- fb->ColorDrawBuffer[0] = GL_COLOR_ATTACHMENT0_EXT;
- fb->_ColorDrawBufferMask[0] = BUFFER_BIT_COLOR0;
- fb->ColorReadBuffer = GL_COLOR_ATTACHMENT0_EXT;
- fb->_ColorReadBufferIndex = BUFFER_COLOR0;
- fb->Delete = _mesa_destroy_framebuffer;
+ _mesa_initialize_user_framebuffer(fb, name);
}
return fb;
}
/**
* Initialize a gl_framebuffer object. Typically used to initialize
* window system-created framebuffers, not user-created framebuffers.
- * \sa _mesa_create_framebuffer
+ * \sa _mesa_initialize_user_framebuffer
*/
void
-_mesa_initialize_framebuffer(struct gl_framebuffer *fb, const GLvisual *visual)
+_mesa_initialize_window_framebuffer(struct gl_framebuffer *fb,
+ const struct gl_config *visual)
{
assert(fb);
assert(visual);
- _mesa_bzero(fb, sizeof(struct gl_framebuffer));
+ memset(fb, 0, sizeof(struct gl_framebuffer));
_glthread_INIT_MUTEX(fb->Mutex);
/* Init read/draw renderbuffer state */
if (visual->doubleBufferMode) {
+ fb->_NumColorDrawBuffers = 1;
fb->ColorDrawBuffer[0] = GL_BACK;
- fb->_ColorDrawBufferMask[0] = BUFFER_BIT_BACK_LEFT;
+ fb->_ColorDrawBufferIndexes[0] = BUFFER_BACK_LEFT;
fb->ColorReadBuffer = GL_BACK;
fb->_ColorReadBufferIndex = BUFFER_BACK_LEFT;
}
else {
+ fb->_NumColorDrawBuffers = 1;
fb->ColorDrawBuffer[0] = GL_FRONT;
- fb->_ColorDrawBufferMask[0] = BUFFER_BIT_FRONT_LEFT;
+ fb->_ColorDrawBufferIndexes[0] = BUFFER_FRONT_LEFT;
fb->ColorReadBuffer = GL_FRONT;
fb->_ColorReadBufferIndex = BUFFER_FRONT_LEFT;
}
}
+/**
+ * Initialize a user-created gl_framebuffer object.
+ * \sa _mesa_initialize_window_framebuffer
+ */
+void
+_mesa_initialize_user_framebuffer(struct gl_framebuffer *fb, GLuint name)
+{
+ assert(fb);
+ assert(name);
+
+ memset(fb, 0, sizeof(struct gl_framebuffer));
+
+ fb->Name = name;
+ fb->RefCount = 1;
+ fb->_NumColorDrawBuffers = 1;
+ fb->ColorDrawBuffer[0] = GL_COLOR_ATTACHMENT0_EXT;
+ fb->_ColorDrawBufferIndexes[0] = BUFFER_COLOR0;
+ fb->ColorReadBuffer = GL_COLOR_ATTACHMENT0_EXT;
+ fb->_ColorReadBufferIndex = BUFFER_COLOR0;
+ fb->Delete = _mesa_destroy_framebuffer;
+ _glthread_INIT_MUTEX(fb->Mutex);
+}
+
+
/**
* Deallocate buffer and everything attached to it.
* Typically called via the gl_framebuffer->Delete() method.
{
if (fb) {
_mesa_free_framebuffer_data(fb);
- _mesa_free(fb);
+ free(fb);
}
}
/* no change */
return;
}
- if (*ptr) {
- _mesa_unreference_framebuffer(ptr);
- }
- assert(!*ptr);
- assert(fb);
- _glthread_LOCK_MUTEX(fb->Mutex);
- fb->RefCount++;
- _glthread_UNLOCK_MUTEX(fb->Mutex);
- *ptr = fb;
-}
-
-/**
- * Undo/remove a reference to a framebuffer object.
- * Decrement the framebuffer object's reference count and delete it when
- * the refcount hits zero.
- * Note: we pass the address of a pointer and set it to NULL.
- */
-void
-_mesa_unreference_framebuffer(struct gl_framebuffer **fb)
-{
- assert(fb);
- if (*fb) {
+ if (*ptr) {
+ /* unreference old renderbuffer */
GLboolean deleteFlag = GL_FALSE;
+ struct gl_framebuffer *oldFb = *ptr;
- _glthread_LOCK_MUTEX((*fb)->Mutex);
- ASSERT((*fb)->RefCount > 0);
- (*fb)->RefCount--;
- deleteFlag = ((*fb)->RefCount == 0);
- _glthread_UNLOCK_MUTEX((*fb)->Mutex);
+ _glthread_LOCK_MUTEX(oldFb->Mutex);
+ ASSERT(oldFb->RefCount > 0);
+ oldFb->RefCount--;
+ deleteFlag = (oldFb->RefCount == 0);
+ _glthread_UNLOCK_MUTEX(oldFb->Mutex);
if (deleteFlag)
- (*fb)->Delete(*fb);
+ oldFb->Delete(oldFb);
- *fb = NULL;
+ *ptr = NULL;
}
-}
-
+ assert(!*ptr);
+ if (fb) {
+ _glthread_LOCK_MUTEX(fb->Mutex);
+ fb->RefCount++;
+ _glthread_UNLOCK_MUTEX(fb->Mutex);
+ *ptr = fb;
+ }
+}
/**
* without a currently bound rendering context.
*/
void
-_mesa_resize_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb,
+_mesa_resize_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
GLuint width, GLuint height)
{
GLuint i;
struct gl_renderbuffer *rb = att->Renderbuffer;
/* only resize if size is changing */
if (rb->Width != width || rb->Height != height) {
- /* could just as well pass rb->_ActualFormat here */
if (rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height)) {
ASSERT(rb->Width == width);
ASSERT(rb->Height == height);
}
+
+/**
+ * XXX THIS IS OBSOLETE - drivers should take care of detecting window
+ * size changes and act accordingly, likely calling _mesa_resize_framebuffer().
+ *
+ * GL_MESA_resize_buffers extension.
+ *
+ * When this function is called, we'll ask the window system how large
+ * the current window is. If it's a new size, we'll call the driver's
+ * ResizeBuffers function. The driver will then resize its color buffers
+ * as needed, and maybe call the swrast's routine for reallocating
+ * swrast-managed depth/stencil/accum/etc buffers.
+ * \note This function should only be called through the GL API, not
+ * from device drivers (as was done in the past).
+ */
+void
+_mesa_resizebuffers( struct gl_context *ctx )
+{
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx );
+
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glResizeBuffersMESA\n");
+
+ if (!ctx->Driver.GetBufferSize) {
+ return;
+ }
+
+ if (ctx->WinSysDrawBuffer) {
+ GLuint newWidth, newHeight;
+ struct gl_framebuffer *buffer = ctx->WinSysDrawBuffer;
+
+ assert(buffer->Name == 0);
+
+ /* ask device driver for size of output buffer */
+ ctx->Driver.GetBufferSize( buffer, &newWidth, &newHeight );
+
+ /* 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->WinSysReadBuffer
+ && ctx->WinSysReadBuffer != ctx->WinSysDrawBuffer) {
+ GLuint newWidth, newHeight;
+ struct gl_framebuffer *buffer = ctx->WinSysReadBuffer;
+
+ assert(buffer->Name == 0);
+
+ /* ask device driver for size of read buffer */
+ ctx->Driver.GetBufferSize( buffer, &newWidth, &newHeight );
+
+ /* 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 */
+}
+
+
+/*
+ * XXX THIS IS OBSOLETE
+ */
+void GLAPIENTRY
+_mesa_ResizeBuffersMESA( void )
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (ctx->Extensions.MESA_resize_buffers)
+ _mesa_resizebuffers( ctx );
+}
+
+
+
/**
* Examine all the framebuffer's renderbuffers to update the Width/Height
* fields of the framebuffer. If we have renderbuffers with different
- * sizes, set the framebuffer's width and height to zero.
+ * sizes, set the framebuffer's width and height to the min size.
* Note: this is only intended for user-created framebuffers, not
* window-system framebuffes.
*/
static void
-update_framebuffer_size(struct gl_framebuffer *fb)
+update_framebuffer_size(struct gl_context *ctx, struct gl_framebuffer *fb)
{
- GLboolean haveSize = GL_FALSE;
+ GLuint minWidth = ~0, minHeight = ~0;
GLuint i;
/* user-created framebuffers only */
struct gl_renderbuffer_attachment *att = &fb->Attachment[i];
const struct gl_renderbuffer *rb = att->Renderbuffer;
if (rb) {
- if (haveSize) {
- if (rb->Width != fb->Width && rb->Height != fb->Height) {
- /* size mismatch! */
- fb->Width = 0;
- fb->Height = 0;
- return;
- }
- }
- else {
- fb->Width = rb->Width;
- fb->Height = rb->Height;
- haveSize = GL_TRUE;
- }
+ minWidth = MIN2(minWidth, rb->Width);
+ minHeight = MIN2(minHeight, rb->Height);
}
}
+
+ if (minWidth != ~0) {
+ fb->Width = minWidth;
+ fb->Height = minHeight;
+ }
+ else {
+ fb->Width = 0;
+ fb->Height = 0;
+ }
}
* \param ctx the GL context.
*/
void
-_mesa_update_draw_buffer_bounds(GLcontext *ctx)
+_mesa_update_draw_buffer_bounds(struct gl_context *ctx)
{
struct gl_framebuffer *buffer = ctx->DrawBuffer;
if (buffer->Name) {
/* user-created framebuffer size depends on the renderbuffers */
- update_framebuffer_size(buffer);
+ update_framebuffer_size(ctx, buffer);
}
buffer->_Xmin = 0;
* integer Z values.
*/
void
-_mesa_update_framebuffer_visual(struct gl_framebuffer *fb)
+_mesa_update_framebuffer_visual(struct gl_context *ctx,
+ struct gl_framebuffer *fb)
{
GLuint i;
- _mesa_bzero(&fb->Visual, sizeof(fb->Visual));
+ memset(&fb->Visual, 0, sizeof(fb->Visual));
fb->Visual.rgbMode = GL_TRUE; /* assume this */
#if 0 /* this _might_ be needed */
}
#endif
- /* find first RGB or CI renderbuffer */
+ /* find first RGB renderbuffer */
for (i = 0; i < BUFFER_COUNT; i++) {
if (fb->Attachment[i].Renderbuffer) {
const struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
- if (rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB) {
- fb->Visual.redBits = rb->RedBits;
- fb->Visual.greenBits = rb->GreenBits;
- fb->Visual.blueBits = rb->BlueBits;
- fb->Visual.alphaBits = rb->AlphaBits;
+ const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
+ const gl_format fmt = rb->Format;
+
+ if (_mesa_is_legal_color_format(ctx, baseFormat)) {
+ fb->Visual.redBits = _mesa_get_format_bits(fmt, GL_RED_BITS);
+ fb->Visual.greenBits = _mesa_get_format_bits(fmt, GL_GREEN_BITS);
+ fb->Visual.blueBits = _mesa_get_format_bits(fmt, GL_BLUE_BITS);
+ fb->Visual.alphaBits = _mesa_get_format_bits(fmt, GL_ALPHA_BITS);
fb->Visual.rgbBits = fb->Visual.redBits
+ fb->Visual.greenBits + fb->Visual.blueBits;
fb->Visual.floatMode = GL_FALSE;
- break;
- }
- else if (rb->_BaseFormat == GL_COLOR_INDEX) {
- fb->Visual.indexBits = rb->IndexBits;
- fb->Visual.rgbMode = GL_FALSE;
+ fb->Visual.samples = rb->NumSamples;
break;
}
}
}
if (fb->Attachment[BUFFER_DEPTH].Renderbuffer) {
+ const struct gl_renderbuffer *rb =
+ fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ const gl_format fmt = rb->Format;
fb->Visual.haveDepthBuffer = GL_TRUE;
- fb->Visual.depthBits
- = fb->Attachment[BUFFER_DEPTH].Renderbuffer->DepthBits;
+ fb->Visual.depthBits = _mesa_get_format_bits(fmt, GL_DEPTH_BITS);
}
if (fb->Attachment[BUFFER_STENCIL].Renderbuffer) {
+ const struct gl_renderbuffer *rb =
+ fb->Attachment[BUFFER_STENCIL].Renderbuffer;
+ const gl_format fmt = rb->Format;
fb->Visual.haveStencilBuffer = GL_TRUE;
- fb->Visual.stencilBits
- = fb->Attachment[BUFFER_STENCIL].Renderbuffer->StencilBits;
+ fb->Visual.stencilBits = _mesa_get_format_bits(fmt, GL_STENCIL_BITS);
}
if (fb->Attachment[BUFFER_ACCUM].Renderbuffer) {
+ const struct gl_renderbuffer *rb =
+ fb->Attachment[BUFFER_ACCUM].Renderbuffer;
+ const gl_format fmt = rb->Format;
fb->Visual.haveAccumBuffer = GL_TRUE;
- fb->Visual.accumRedBits
- = fb->Attachment[BUFFER_DEPTH].Renderbuffer->RedBits;
- fb->Visual.accumGreenBits
- = fb->Attachment[BUFFER_DEPTH].Renderbuffer->GreenBits;
- fb->Visual.accumBlueBits
- = fb->Attachment[BUFFER_DEPTH].Renderbuffer->BlueBits;
- fb->Visual.accumAlphaBits
- = fb->Attachment[BUFFER_DEPTH].Renderbuffer->AlphaBits;
+ fb->Visual.accumRedBits = _mesa_get_format_bits(fmt, GL_RED_BITS);
+ fb->Visual.accumGreenBits = _mesa_get_format_bits(fmt, GL_GREEN_BITS);
+ fb->Visual.accumBlueBits = _mesa_get_format_bits(fmt, GL_BLUE_BITS);
+ fb->Visual.accumAlphaBits = _mesa_get_format_bits(fmt, GL_ALPHA_BITS);
}
compute_depth_max(fb);
* \param attIndex indicates the renderbuffer to possibly wrap
*/
void
-_mesa_update_depth_buffer(GLcontext *ctx,
+_mesa_update_depth_buffer(struct gl_context *ctx,
struct gl_framebuffer *fb,
GLuint attIndex)
{
depthRb = fb->Attachment[attIndex].Renderbuffer;
- if (depthRb && depthRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT) {
+ if (depthRb && _mesa_is_format_packed_depth_stencil(depthRb->Format)) {
/* The attached depth buffer is a GL_DEPTH_STENCIL renderbuffer */
if (!fb->_DepthBuffer
|| fb->_DepthBuffer->Wrapped != depthRb
- || fb->_DepthBuffer->_BaseFormat != GL_DEPTH_COMPONENT) {
+ || _mesa_get_format_base_format(fb->_DepthBuffer->Format) != GL_DEPTH_COMPONENT) {
/* need to update wrapper */
struct gl_renderbuffer *wrapper
= _mesa_new_z24_renderbuffer_wrapper(ctx, depthRb);
* \param attIndex indicates the renderbuffer to possibly wrap
*/
void
-_mesa_update_stencil_buffer(GLcontext *ctx,
+_mesa_update_stencil_buffer(struct gl_context *ctx,
struct gl_framebuffer *fb,
GLuint attIndex)
{
stencilRb = fb->Attachment[attIndex].Renderbuffer;
- if (stencilRb && stencilRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT) {
+ if (stencilRb && _mesa_is_format_packed_depth_stencil(stencilRb->Format)) {
/* The attached stencil buffer is a GL_DEPTH_STENCIL renderbuffer */
if (!fb->_StencilBuffer
|| fb->_StencilBuffer->Wrapped != stencilRb
- || fb->_StencilBuffer->_BaseFormat != GL_STENCIL_INDEX) {
+ || _mesa_get_format_base_format(fb->_StencilBuffer->Format) != GL_STENCIL_INDEX) {
/* need to update wrapper */
struct gl_renderbuffer *wrapper
= _mesa_new_s8_renderbuffer_wrapper(ctx, stencilRb);
}
+/*
+ * Example DrawBuffers scenarios:
+ *
+ * 1. glDrawBuffer(GL_FRONT_AND_BACK), fixed-func or shader writes to
+ * "gl_FragColor" or program writes to the "result.color" register:
+ *
+ * fragment color output renderbuffer
+ * --------------------- ---------------
+ * color[0] Front, Back
+ *
+ *
+ * 2. glDrawBuffers(3, [GL_FRONT, GL_AUX0, GL_AUX1]), shader writes to
+ * gl_FragData[i] or program writes to result.color[i] registers:
+ *
+ * fragment color output renderbuffer
+ * --------------------- ---------------
+ * color[0] Front
+ * color[1] Aux0
+ * color[3] Aux1
+ *
+ *
+ * 3. glDrawBuffers(3, [GL_FRONT, GL_AUX0, GL_AUX1]) and shader writes to
+ * gl_FragColor, or fixed function:
+ *
+ * fragment color output renderbuffer
+ * --------------------- ---------------
+ * color[0] Front, Aux0, Aux1
+ *
+ *
+ * In either case, the list of renderbuffers is stored in the
+ * framebuffer->_ColorDrawBuffers[] array and
+ * framebuffer->_NumColorDrawBuffers indicates the number of buffers.
+ * The renderer (like swrast) has to look at the current fragment shader
+ * to see if it writes to gl_FragColor vs. gl_FragData[i] to determine
+ * how to map color outputs to renderbuffers.
+ *
+ * Note that these two calls are equivalent (for fixed function fragment
+ * shading anyway):
+ * a) glDrawBuffer(GL_FRONT_AND_BACK); (assuming non-stereo framebuffer)
+ * b) glDrawBuffers(2, [GL_FRONT_LEFT, GL_BACK_LEFT]);
+ */
+
+
+
+
/**
* Update the (derived) list of color drawing renderbuffer pointers.
* Later, when we're rendering we'll loop from 0 to _NumColorDrawBuffers
* writing colors.
*/
static void
-update_color_draw_buffers(GLcontext *ctx, struct gl_framebuffer *fb)
+update_color_draw_buffers(struct gl_context *ctx, struct gl_framebuffer *fb)
{
GLuint output;
- /*
- * Fragment programs can write to multiple colorbuffers with
- * the GL_ARB_draw_buffers extension.
- */
- for (output = 0; output < ctx->Const.MaxDrawBuffers; output++) {
- GLbitfield bufferMask = fb->_ColorDrawBufferMask[output];
- GLuint count = 0;
- GLuint i;
- if (!fb->DeletePending) {
- /* We need the inner loop here because glDrawBuffer(GL_FRONT_AND_BACK)
- * can specify writing to two or four color buffers (for example).
- */
- for (i = 0; bufferMask && i < BUFFER_COUNT; i++) {
- const GLuint bufferBit = 1 << i;
- if (bufferBit & bufferMask) {
- struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
- if (rb && rb->Width > 0 && rb->Height > 0) {
- fb->_ColorDrawBuffers[output][count] = rb;
- count++;
- }
- else {
- /*
- _mesa_warning(ctx, "DrawBuffer names a missing buffer!\n");
- */
- }
- bufferMask &= ~bufferBit;
- }
- }
+ /* set 0th buffer to NULL now in case _NumColorDrawBuffers is zero */
+ fb->_ColorDrawBuffers[0] = NULL;
+
+ for (output = 0; output < fb->_NumColorDrawBuffers; output++) {
+ GLint buf = fb->_ColorDrawBufferIndexes[output];
+ if (buf >= 0) {
+ fb->_ColorDrawBuffers[output] = fb->Attachment[buf].Renderbuffer;
+ }
+ else {
+ fb->_ColorDrawBuffers[output] = NULL;
}
- fb->_NumColorDrawBuffers[output] = count;
}
}
* Unlike the DrawBuffer, we can only read from one (or zero) color buffers.
*/
static void
-update_color_read_buffer(GLcontext *ctx, struct gl_framebuffer *fb)
+update_color_read_buffer(struct gl_context *ctx, struct gl_framebuffer *fb)
{
(void) ctx;
if (fb->_ColorReadBufferIndex == -1 ||
* glRenderbufferStorageEXT.
*/
static void
-update_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
+update_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
{
if (fb->Name == 0) {
/* This is a window-system framebuffer */
/* This is a user-created framebuffer.
* Completeness only matters for user-created framebuffers.
*/
- _mesa_test_framebuffer_completeness(ctx, fb);
- _mesa_update_framebuffer_visual(fb);
+ if (fb->_Status != GL_FRAMEBUFFER_COMPLETE) {
+ _mesa_test_framebuffer_completeness(ctx, fb);
+ }
}
/* Strictly speaking, we don't need to update the draw-state
* Update state related to the current draw/read framebuffers.
*/
void
-_mesa_update_framebuffer(GLcontext *ctx)
+_mesa_update_framebuffer(struct gl_context *ctx)
{
- struct gl_framebuffer *drawFb = ctx->DrawBuffer;
- struct gl_framebuffer *readFb = ctx->ReadBuffer;
+ struct gl_framebuffer *drawFb;
+ struct gl_framebuffer *readFb;
+
+ assert(ctx);
+ drawFb = ctx->DrawBuffer;
+ readFb = ctx->ReadBuffer;
update_framebuffer(ctx, drawFb);
if (readFb != drawFb)
/**
* Check if the renderbuffer for a read operation (glReadPixels, glCopyPixels,
- * glCopyTex[Sub]Image, etc. exists.
+ * glCopyTex[Sub]Image, etc) exists.
* \param format a basic image format such as GL_RGB, GL_RGBA, GL_ALPHA,
* GL_DEPTH_COMPONENT, etc. or GL_COLOR, GL_DEPTH, GL_STENCIL.
* \return GL_TRUE if buffer exists, GL_FALSE otherwise
*/
GLboolean
-_mesa_source_buffer_exists(GLcontext *ctx, GLenum format)
+_mesa_source_buffer_exists(struct gl_context *ctx, GLenum format)
{
- const struct gl_renderbuffer_attachment *att
- = ctx->ReadBuffer->Attachment;
+ const struct gl_renderbuffer_attachment *att = ctx->ReadBuffer->Attachment;
+
+ /* If we don't know the framebuffer status, update it now */
+ if (ctx->ReadBuffer->_Status == 0) {
+ _mesa_test_framebuffer_completeness(ctx, ctx->ReadBuffer);
+ }
if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
return GL_FALSE;
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
case GL_INTENSITY:
+ case GL_RG:
case GL_RGB:
case GL_BGR:
case GL_RGBA:
case GL_BGRA:
case GL_ABGR_EXT:
case GL_COLOR_INDEX:
+ case GL_RED_INTEGER_EXT:
+ case GL_GREEN_INTEGER_EXT:
+ case GL_BLUE_INTEGER_EXT:
+ case GL_ALPHA_INTEGER_EXT:
+ case GL_RGB_INTEGER_EXT:
+ case GL_RGBA_INTEGER_EXT:
+ case GL_BGR_INTEGER_EXT:
+ case GL_BGRA_INTEGER_EXT:
+ case GL_LUMINANCE_INTEGER_EXT:
+ case GL_LUMINANCE_ALPHA_INTEGER_EXT:
if (ctx->ReadBuffer->_ColorReadBuffer == NULL) {
return GL_FALSE;
}
- /* XXX enable this post 6.5 release:
- ASSERT(ctx->ReadBuffer->_ColorReadBuffer->RedBits > 0 ||
- ctx->ReadBuffer->_ColorReadBuffer->IndexBits > 0);
- */
+ ASSERT(_mesa_get_format_bits(ctx->ReadBuffer->_ColorReadBuffer->Format, GL_RED_BITS) > 0 ||
+ _mesa_get_format_bits(ctx->ReadBuffer->_ColorReadBuffer->Format, GL_ALPHA_BITS) > 0 ||
+ _mesa_get_format_bits(ctx->ReadBuffer->_ColorReadBuffer->Format, GL_INDEX_BITS) > 0);
break;
case GL_DEPTH:
case GL_DEPTH_COMPONENT:
if (!att[BUFFER_DEPTH].Renderbuffer) {
return GL_FALSE;
}
- ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);
+ /*ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);*/
break;
case GL_STENCIL:
case GL_STENCIL_INDEX:
if (!att[BUFFER_STENCIL].Renderbuffer) {
return GL_FALSE;
}
- ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);
+ /*ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);*/
break;
case GL_DEPTH_STENCIL_EXT:
if (!att[BUFFER_DEPTH].Renderbuffer ||
!att[BUFFER_STENCIL].Renderbuffer) {
return GL_FALSE;
}
+ /*
ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);
ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);
+ */
break;
default:
_mesa_problem(ctx,
/**
* As above, but for drawing operations.
- * XXX code do some code merging w/ above function.
+ * XXX could do some code merging w/ above function.
*/
GLboolean
-_mesa_dest_buffer_exists(GLcontext *ctx, GLenum format)
+_mesa_dest_buffer_exists(struct gl_context *ctx, GLenum format)
{
- const struct gl_renderbuffer_attachment *att
- = ctx->ReadBuffer->Attachment;
+ const struct gl_renderbuffer_attachment *att = ctx->DrawBuffer->Attachment;
+
+ /* If we don't know the framebuffer status, update it now */
+ if (ctx->DrawBuffer->_Status == 0) {
+ _mesa_test_framebuffer_completeness(ctx, ctx->DrawBuffer);
+ }
if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
return GL_FALSE;
case GL_BGRA:
case GL_ABGR_EXT:
case GL_COLOR_INDEX:
- /* nothing special */
+ case GL_RED_INTEGER_EXT:
+ case GL_GREEN_INTEGER_EXT:
+ case GL_BLUE_INTEGER_EXT:
+ case GL_ALPHA_INTEGER_EXT:
+ case GL_RGB_INTEGER_EXT:
+ case GL_RGBA_INTEGER_EXT:
+ case GL_BGR_INTEGER_EXT:
+ case GL_BGRA_INTEGER_EXT:
+ case GL_LUMINANCE_INTEGER_EXT:
+ case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+ /* Nothing special since GL_DRAW_BUFFER could be GL_NONE. */
/* Could assert that colorbuffer has RedBits > 0 */
break;
case GL_DEPTH:
if (!att[BUFFER_DEPTH].Renderbuffer) {
return GL_FALSE;
}
- ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);
+ /*ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);*/
break;
case GL_STENCIL:
case GL_STENCIL_INDEX:
if (!att[BUFFER_STENCIL].Renderbuffer) {
return GL_FALSE;
}
- ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);
+ /*ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);*/
break;
case GL_DEPTH_STENCIL_EXT:
if (!att[BUFFER_DEPTH].Renderbuffer ||
!att[BUFFER_STENCIL].Renderbuffer) {
return GL_FALSE;
}
+ /*
ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);
ASSERT(att[BUFFER_STENCIL].Renderbuffer->StencilBits > 0);
+ */
break;
default:
_mesa_problem(ctx,
- "Unexpected format 0x%x in _mesa_source_buffer_exists",
+ "Unexpected format 0x%x in _mesa_dest_buffer_exists",
format);
return GL_FALSE;
}
/* OK */
return GL_TRUE;
}
+
+
+/**
+ * Used to answer the GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES query.
+ */
+GLenum
+_mesa_get_color_read_format(struct gl_context *ctx)
+{
+ switch (ctx->ReadBuffer->_ColorReadBuffer->Format) {
+ case MESA_FORMAT_ARGB8888:
+ return GL_BGRA;
+ case MESA_FORMAT_RGB565:
+ return GL_BGR;
+ default:
+ return GL_RGBA;
+ }
+}
+
+
+/**
+ * Used to answer the GL_IMPLEMENTATION_COLOR_READ_TYPE_OES query.
+ */
+GLenum
+_mesa_get_color_read_type(struct gl_context *ctx)
+{
+ switch (ctx->ReadBuffer->_ColorReadBuffer->Format) {
+ case MESA_FORMAT_ARGB8888:
+ return GL_UNSIGNED_BYTE;
+ case MESA_FORMAT_RGB565:
+ return GL_UNSIGNED_SHORT_5_6_5_REV;
+ default:
+ return GL_UNSIGNED_BYTE;
+ }
+}
+
+
+/**
+ * Print framebuffer info to stderr, for debugging.
+ */
+void
+_mesa_print_framebuffer(const struct gl_framebuffer *fb)
+{
+ GLuint i;
+
+ fprintf(stderr, "Mesa Framebuffer %u at %p\n", fb->Name, (void *) fb);
+ fprintf(stderr, " Size: %u x %u Status: %s\n", fb->Width, fb->Height,
+ _mesa_lookup_enum_by_nr(fb->_Status));
+ fprintf(stderr, " Attachments:\n");
+
+ for (i = 0; i < BUFFER_COUNT; i++) {
+ const struct gl_renderbuffer_attachment *att = &fb->Attachment[i];
+ if (att->Type == GL_TEXTURE) {
+ const struct gl_texture_image *texImage;
+ fprintf(stderr,
+ " %2d: Texture %u, level %u, face %u, slice %u, complete %d\n",
+ i, att->Texture->Name, att->TextureLevel, att->CubeMapFace,
+ att->Zoffset, att->Complete);
+ texImage = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
+ fprintf(stderr, " Size: %u x %u x %u Format %s\n",
+ texImage->Width, texImage->Height, texImage->Depth,
+ _mesa_get_format_name(texImage->TexFormat));
+ }
+ else if (att->Type == GL_RENDERBUFFER) {
+ fprintf(stderr, " %2d: Renderbuffer %u, complete %d\n",
+ i, att->Renderbuffer->Name, att->Complete);
+ fprintf(stderr, " Size: %u x %u Format %s\n",
+ att->Renderbuffer->Width, att->Renderbuffer->Height,
+ _mesa_get_format_name(att->Renderbuffer->Format));
+ }
+ else {
+ fprintf(stderr, " %2d: none\n", i);
+ }
+ }
+}
projects / mesa.git / blobdiff