/*
* Mesa 3-D graphics library
- * Version: 6.5
+ * Version: 6.5.1
*
- * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2006 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 "context.h"
+#include "depthstencil.h"
#include "mtypes.h"
#include "fbobject.h"
#include "framebuffer.h"
fb->_DepthMax = 0xffffffff;
}
fb->_DepthMaxF = (GLfloat) fb->_DepthMax;
- fb->_MRD = 1.0; /* Minimum resolvable depth value, for polygon offset */
+
+ /* Minimum resolvable depth value, for polygon offset */
+ fb->_MRD = 1.0 / fb->_DepthMaxF;
}
_mesa_new_framebuffer(GLcontext *ctx, GLuint name)
{
struct gl_framebuffer *fb;
+ (void) ctx;
assert(name != 0);
fb = CALLOC_STRUCT(gl_framebuffer);
if (fb) {
_mesa_bzero(fb, sizeof(struct gl_framebuffer));
+ _glthread_INIT_MUTEX(fb->Mutex);
+
+ fb->RefCount = 1;
+
/* save the visual */
fb->Visual = *visual;
{
if (fb) {
_mesa_free_framebuffer_data(fb);
- FREE(fb);
+ _mesa_free(fb);
}
}
GLuint i;
assert(fb);
+ assert(fb->RefCount == 0);
+
+ _glthread_DESTROY_MUTEX(fb->Mutex);
for (i = 0; i < BUFFER_COUNT; i++) {
struct gl_renderbuffer_attachment *att = &fb->Attachment[i];
- if (att->Type == GL_RENDERBUFFER_EXT && att->Renderbuffer) {
- struct gl_renderbuffer *rb = att->Renderbuffer;
- rb->RefCount--;
- if (rb->RefCount == 0) {
- rb->Delete(rb);
+ if (att->Renderbuffer) {
+ _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
+ }
+ if (att->Texture) {
+ /* render to texture */
+ att->Texture->RefCount--;
+ if (att->Texture->RefCount == 0) {
+ GET_CURRENT_CONTEXT(ctx);
+ if (ctx) {
+ ctx->Driver.DeleteTexture(ctx, att->Texture);
+ }
}
}
att->Type = GL_NONE;
- att->Renderbuffer = NULL;
+ att->Texture = NULL;
+ }
+
+ /* unbind _Depth/_StencilBuffer to decr ref counts */
+ _mesa_reference_renderbuffer(&fb->_DepthBuffer, NULL);
+ _mesa_reference_renderbuffer(&fb->_StencilBuffer, NULL);
+}
+
+
+/**
+ * Set *ptr to point to fb, with refcounting and locking.
+ */
+void
+_mesa_reference_framebuffer(struct gl_framebuffer **ptr,
+ struct gl_framebuffer *fb)
+{
+ assert(ptr);
+ if (*ptr == 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) {
+ GLboolean deleteFlag = GL_FALSE;
+
+ _glthread_LOCK_MUTEX((*fb)->Mutex);
+ ASSERT((*fb)->RefCount > 0);
+ (*fb)->RefCount--;
+ deleteFlag = ((*fb)->RefCount == 0);
+ _glthread_UNLOCK_MUTEX((*fb)->Mutex);
+
+ if (deleteFlag)
+ (*fb)->Delete(*fb);
+
+ *fb = NULL;
+ }
+}
+
+
+
+
/**
* Resize the given framebuffer's renderbuffers to the new width and height.
* This should only be used for window-system framebuffers, not
* user-created renderbuffers (i.e. made with GL_EXT_framebuffer_object).
- * This will typically be called via ctx->Driver.ResizeBuffers()
+ * This will typically be called via ctx->Driver.ResizeBuffers() or directly
+ * from a device driver.
+ *
+ * \note it's possible for ctx to be null since a window can be resized
+ * without a currently bound rendering context.
*/
void
_mesa_resize_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb,
{
GLuint i;
+ /* XXX I think we could check if the size is not changing
+ * and return early.
+ */
+
/* For window system framebuffers, Name is zero */
assert(fb->Name == 0);
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)) {
- rb->Width = width;
- rb->Height = height;
+ ASSERT(rb->Width == width);
+ ASSERT(rb->Height == height);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "Resizing framebuffer");
+ /* no return */
}
}
}
}
+ if (fb->_DepthBuffer) {
+ struct gl_renderbuffer *rb = fb->_DepthBuffer;
+ if (rb->Width != width || rb->Height != height) {
+ if (!rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height)) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "Resizing framebuffer");
+ }
+ }
+ }
+
+ if (fb->_StencilBuffer) {
+ struct gl_renderbuffer *rb = fb->_StencilBuffer;
+ if (rb->Width != width || rb->Height != height) {
+ if (!rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height)) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "Resizing framebuffer");
+ }
+ }
+ }
+
fb->Width = width;
fb->Height = height;
- /* to update scissor / window bounds */
- if (ctx)
+ if (ctx) {
+ /* update scissor / window bounds */
+ _mesa_update_draw_buffer_bounds(ctx);
+ /* Signal new buffer state so that swrast will update its clipping
+ * info (the CLIP_BIT flag).
+ */
ctx->NewState |= _NEW_BUFFERS;
+ }
}
{
struct gl_framebuffer *buffer = ctx->DrawBuffer;
+ if (!buffer)
+ return;
+
if (buffer->Name) {
/* user-created framebuffer size depends on the renderbuffers */
update_framebuffer_size(buffer);
* etc. are satisfied by the fields of ctx->DrawBuffer->Visual. These can
* change depending on the renderbuffer bindings. This function updates
* the given framebuffer's Visual from the current renderbuffer bindings.
- * This is only intended for user-created framebuffers.
+ *
+ * This may apply to user-created framebuffers or window system framebuffers.
*
* Also note: ctx->DrawBuffer->Visual.depthBits might not equal
* ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer.DepthBits.
{
GLuint i;
- assert(fb->Name != 0);
-
_mesa_bzero(&fb->Visual, sizeof(fb->Visual));
fb->Visual.rgbMode = GL_TRUE; /* assume this */
+#if 0 /* this _might_ be needed */
+ if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ /* leave visual fields zero'd */
+ return;
+ }
+#endif
+
/* find first RGB or CI renderbuffer */
for (i = 0; i < BUFFER_COUNT; i++) {
if (fb->Attachment[i].Renderbuffer) {
= fb->Attachment[BUFFER_STENCIL].Renderbuffer->StencilBits;
}
+ if (fb->Attachment[BUFFER_ACCUM].Renderbuffer) {
+ 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;
+ }
+
compute_depth_max(fb);
}
/**
- * Update state related to the current draw/read framebuffers.
- * Specifically, update these framebuffer fields:
- * _ColorDrawBuffers
- * _NumColorDrawBuffers
- * _ColorReadBuffer
- * If the current framebuffer is user-created, make sure it's complete.
- * The following functions can effect this state: glReadBuffer,
- * glDrawBuffer, glDrawBuffersARB, glFramebufferRenderbufferEXT.
+ * Update the framebuffer's _DepthBuffer field using the renderbuffer
+ * found at the given attachment index.
+ *
+ * If that attachment points to a combined GL_DEPTH_STENCIL renderbuffer,
+ * create and install a depth wrapper/adaptor.
+ *
+ * \param fb the framebuffer whose _DepthBuffer field to update
+ * \param attIndex indicates the renderbuffer to possibly wrap
*/
void
-_mesa_update_framebuffer(GLcontext *ctx)
+_mesa_update_depth_buffer(GLcontext *ctx,
+ struct gl_framebuffer *fb,
+ GLuint attIndex)
{
- struct gl_framebuffer *fb = ctx->DrawBuffer;
- GLuint output;
+ struct gl_renderbuffer *depthRb;
+
+ /* only one possiblity for now */
+ ASSERT(attIndex == BUFFER_DEPTH);
+
+ depthRb = fb->Attachment[attIndex].Renderbuffer;
+
+ if (depthRb && depthRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT) {
+ /* The attached depth buffer is a GL_DEPTH_STENCIL renderbuffer */
+ if (!fb->_DepthBuffer
+ || fb->_DepthBuffer->Wrapped != depthRb
+ || fb->_DepthBuffer->_BaseFormat != GL_DEPTH_COMPONENT) {
+ /* need to update wrapper */
+ struct gl_renderbuffer *wrapper
+ = _mesa_new_z24_renderbuffer_wrapper(ctx, depthRb);
+ _mesa_reference_renderbuffer(&fb->_DepthBuffer, wrapper);
+ ASSERT(fb->_DepthBuffer->Wrapped == depthRb);
+ }
+ }
+ else {
+ /* depthRb may be null */
+ _mesa_reference_renderbuffer(&fb->_DepthBuffer, depthRb);
+ }
+}
- /* Completeness only matters for user-created framebuffers */
- if (fb->Name != 0) {
- _mesa_test_framebuffer_completeness(ctx, fb);
- _mesa_update_framebuffer_visual(fb);
+
+/**
+ * Update the framebuffer's _StencilBuffer field using the renderbuffer
+ * found at the given attachment index.
+ *
+ * If that attachment points to a combined GL_DEPTH_STENCIL renderbuffer,
+ * create and install a stencil wrapper/adaptor.
+ *
+ * \param fb the framebuffer whose _StencilBuffer field to update
+ * \param attIndex indicates the renderbuffer to possibly wrap
+ */
+void
+_mesa_update_stencil_buffer(GLcontext *ctx,
+ struct gl_framebuffer *fb,
+ GLuint attIndex)
+{
+ struct gl_renderbuffer *stencilRb;
+
+ ASSERT(attIndex == BUFFER_DEPTH ||
+ attIndex == BUFFER_STENCIL);
+
+ stencilRb = fb->Attachment[attIndex].Renderbuffer;
+
+ if (stencilRb && stencilRb->_ActualFormat == GL_DEPTH24_STENCIL8_EXT) {
+ /* The attached stencil buffer is a GL_DEPTH_STENCIL renderbuffer */
+ if (!fb->_StencilBuffer
+ || fb->_StencilBuffer->Wrapped != stencilRb
+ || fb->_StencilBuffer->_BaseFormat != GL_STENCIL_INDEX) {
+ /* need to update wrapper */
+ struct gl_renderbuffer *wrapper
+ = _mesa_new_s8_renderbuffer_wrapper(ctx, stencilRb);
+ _mesa_reference_renderbuffer(&fb->_StencilBuffer, wrapper);
+ ASSERT(fb->_StencilBuffer->Wrapped == stencilRb);
+ }
+ }
+ else {
+ /* stencilRb may be null */
+ _mesa_reference_renderbuffer(&fb->_StencilBuffer, stencilRb);
}
+}
+
+
+/**
+ * Update the 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)
+{
+ GLuint output;
/*
- * Update the list of color drawing renderbuffer pointers.
- * Later, when we're rendering we'll loop from 0 to _NumColorDrawBuffers
- * writing colors. We need the inner loop here because
- * glDrawBuffer(GL_FRONT_AND_BACK) can specify writing to two or four
- * color buffers (for example).
+ * 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;
- 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) {
- fb->_ColorDrawBuffers[output][count] = rb;
- count++;
- }
- else {
- /*_mesa_warning(ctx, "DrawBuffer names a missing buffer!\n");*/
+ 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;
}
- bufferMask &= ~bufferBit;
}
}
fb->_NumColorDrawBuffers[output] = count;
}
+}
- /*
- * Update the color read renderbuffer pointer.
- * Unlike the DrawBuffer, we can only read from one (or zero) color buffers.
- */
- if (fb->_ColorReadBufferIndex == -1) {
+
+/**
+ * Update the color read renderbuffer pointer.
+ * 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)
+{
+ (void) ctx;
+ if (fb->_ColorReadBufferIndex == -1 ||
+ fb->DeletePending ||
+ fb->Width == 0 ||
+ fb->Height == 0) {
fb->_ColorReadBuffer = NULL; /* legal! */
}
else {
fb->_ColorReadBuffer
= fb->Attachment[fb->_ColorReadBufferIndex].Renderbuffer;
}
+}
+
+
+static void
+update_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
+{
+ /* Completeness only matters for user-created framebuffers */
+ if (fb->Name != 0) {
+ /* XXX: EXT_framebuffer_blit:
+ framebuffer must still be complete wrt read/draw? */
+ _mesa_test_framebuffer_completeness(ctx, fb);
+ _mesa_update_framebuffer_visual(fb);
+ }
+
+ /* update_color_draw/read_buffers not needed for
+ read/draw only fb, but shouldn't hurt ??? */
+ update_color_draw_buffers(ctx, fb);
+ update_color_read_buffer(ctx, fb);
+ _mesa_update_depth_buffer(ctx, fb, BUFFER_DEPTH);
+ _mesa_update_stencil_buffer(ctx, fb, BUFFER_STENCIL);
+
compute_depth_max(fb);
}
+
+/**
+ * Update state related to the current draw/read framebuffers.
+ * Specifically, update these framebuffer fields:
+ * _ColorDrawBuffers
+ * _NumColorDrawBuffers
+ * _ColorReadBuffer
+ * _DepthBuffer
+ * _StencilBuffer
+ * If the current framebuffer is user-created, make sure it's complete.
+ * The following functions can effect this state: glReadBuffer,
+ * glDrawBuffer, glDrawBuffersARB, glFramebufferRenderbufferEXT,
+ * glRenderbufferStorageEXT.
+ */
+void
+_mesa_update_framebuffer(GLcontext *ctx)
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_framebuffer *fbread = ctx->ReadBuffer;
+
+ update_framebuffer(ctx, fb);
+ if (fbread != fb)
+ update_framebuffer(ctx, fbread);
+}
+
+
+/**
+ * Check if the renderbuffer for a read operation (glReadPixels, glCopyPixels,
+ * 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)
+{
+ const struct gl_renderbuffer_attachment *att
+ = ctx->ReadBuffer->Attachment;
+
+ if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ return GL_FALSE;
+ }
+
+ switch (format) {
+ case GL_COLOR:
+ case GL_RED:
+ case GL_GREEN:
+ case GL_BLUE:
+ case GL_ALPHA:
+ case GL_LUMINANCE:
+ case GL_LUMINANCE_ALPHA:
+ case GL_INTENSITY:
+ case GL_RGB:
+ case GL_BGR:
+ case GL_RGBA:
+ case GL_BGRA:
+ case GL_ABGR_EXT:
+ case GL_COLOR_INDEX:
+ 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);
+ */
+ break;
+ case GL_DEPTH:
+ case GL_DEPTH_COMPONENT:
+ if (!att[BUFFER_DEPTH].Renderbuffer) {
+ return GL_FALSE;
+ }
+ 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);
+ 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",
+ format);
+ return GL_FALSE;
+ }
+
+ /* OK */
+ return GL_TRUE;
+}
+
+
+/**
+ * As above, but for drawing operations.
+ * XXX code do some code merging w/ above function.
+ */
+GLboolean
+_mesa_dest_buffer_exists(GLcontext *ctx, GLenum format)
+{
+ const struct gl_renderbuffer_attachment *att
+ = ctx->ReadBuffer->Attachment;
+
+ if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ return GL_FALSE;
+ }
+
+ switch (format) {
+ case GL_COLOR:
+ case GL_RED:
+ case GL_GREEN:
+ case GL_BLUE:
+ case GL_ALPHA:
+ case GL_LUMINANCE:
+ case GL_LUMINANCE_ALPHA:
+ case GL_INTENSITY:
+ case GL_RGB:
+ case GL_BGR:
+ case GL_RGBA:
+ case GL_BGRA:
+ case GL_ABGR_EXT:
+ case GL_COLOR_INDEX:
+ /* nothing special */
+ /* Could assert that colorbuffer has RedBits > 0 */
+ break;
+ case GL_DEPTH:
+ case GL_DEPTH_COMPONENT:
+ if (!att[BUFFER_DEPTH].Renderbuffer) {
+ return GL_FALSE;
+ }
+ 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);
+ 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",
+ format);
+ return GL_FALSE;
+ }
+
+ /* OK */
+ return GL_TRUE;
+}
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