/*
* Mesa 3-D graphics library
- * Version: 7.2
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
*/
* ushorts, uints, etc.
*/
-
+#include <stdio.h>
#include "glheader.h"
#include "imports.h"
+#include "blend.h"
#include "buffers.h"
#include "context.h"
-#include "depthstencil.h"
#include "enums.h"
#include "formats.h"
#include "macros.h"
#include "framebuffer.h"
#include "renderbuffer.h"
#include "texobj.h"
+#include "glformats.h"
memset(fb, 0, sizeof(struct gl_framebuffer));
- _glthread_INIT_MUTEX(fb->Mutex);
+ mtx_init(&fb->Mutex, mtx_plain);
fb->RefCount = 1;
fb->Delete = _mesa_destroy_framebuffer;
fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
+ fb->_AllColorBuffersFixedPoint = !visual->floatMode;
+ fb->_HasSNormOrFloatColorBuffer = visual->floatMode;
compute_depth_max(fb);
}
fb->ColorReadBuffer = GL_COLOR_ATTACHMENT0_EXT;
fb->_ColorReadBufferIndex = BUFFER_COLOR0;
fb->Delete = _mesa_destroy_framebuffer;
- _glthread_INIT_MUTEX(fb->Mutex);
+ mtx_init(&fb->Mutex, mtx_plain);
}
{
if (fb) {
_mesa_free_framebuffer_data(fb);
+ free(fb->Label);
free(fb);
}
}
assert(fb);
assert(fb->RefCount == 0);
- _glthread_DESTROY_MUTEX(fb->Mutex);
+ mtx_destroy(&fb->Mutex);
for (i = 0; i < BUFFER_COUNT; i++) {
struct gl_renderbuffer_attachment *att = &fb->Attachment[i];
if (att->Texture) {
_mesa_reference_texobj(&att->Texture, NULL);
}
- ASSERT(!att->Renderbuffer);
- ASSERT(!att->Texture);
+ assert(!att->Renderbuffer);
+ assert(!att->Texture);
att->Type = GL_NONE;
}
-
- /* 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.
+ * This is normally only called from the _mesa_reference_framebuffer() macro
+ * when there's a real pointer change.
*/
void
-_mesa_reference_framebuffer(struct gl_framebuffer **ptr,
- struct gl_framebuffer *fb)
+_mesa_reference_framebuffer_(struct gl_framebuffer **ptr,
+ struct gl_framebuffer *fb)
{
- assert(ptr);
- if (*ptr == fb) {
- /* no change */
- return;
- }
-
if (*ptr) {
/* unreference old renderbuffer */
GLboolean deleteFlag = GL_FALSE;
struct gl_framebuffer *oldFb = *ptr;
- _glthread_LOCK_MUTEX(oldFb->Mutex);
- ASSERT(oldFb->RefCount > 0);
+ mtx_lock(&oldFb->Mutex);
+ assert(oldFb->RefCount > 0);
oldFb->RefCount--;
deleteFlag = (oldFb->RefCount == 0);
- _glthread_UNLOCK_MUTEX(oldFb->Mutex);
+ mtx_unlock(&oldFb->Mutex);
if (deleteFlag)
oldFb->Delete(oldFb);
assert(!*ptr);
if (fb) {
- _glthread_LOCK_MUTEX(fb->Mutex);
+ mtx_lock(&fb->Mutex);
fb->RefCount++;
- _glthread_UNLOCK_MUTEX(fb->Mutex);
+ mtx_unlock(&fb->Mutex);
*ptr = fb;
}
}
* and return early.
*/
- /* For window system framebuffers, Name is zero */
- assert(fb->Name == 0);
+ /* Can only resize win-sys framebuffer objects */
+ assert(_mesa_is_winsys_fbo(fb));
for (i = 0; i < BUFFER_COUNT; i++) {
struct gl_renderbuffer_attachment *att = &fb->Attachment[i];
/* only resize if size is changing */
if (rb->Width != width || rb->Height != height) {
if (rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height)) {
- ASSERT(rb->Width == width);
- ASSERT(rb->Height == height);
+ assert(rb->Width == width);
+ assert(rb->Height == height);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "Resizing framebuffer");
}
}
- 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;
}
}
-
-
-/**
- * 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
GLuint i;
/* user-created framebuffers only */
- assert(fb->Name);
+ assert(_mesa_is_user_fbo(fb));
for (i = 0; i < BUFFER_COUNT; i++) {
struct gl_renderbuffer_attachment *att = &fb->Attachment[i];
}
}
- if (minWidth != ~0) {
+ if (minWidth != ~0U) {
fb->Width = minWidth;
fb->Height = minHeight;
}
}
+/**
+ * Calculate the inclusive bounding box for the scissor of a specific viewport
+ *
+ * \param ctx GL context.
+ * \param buffer Framebuffer to be checked against
+ * \param idx Index of the desired viewport
+ * \param bbox Bounding box for the scissored viewport. Stored as xmin,
+ * xmax, ymin, ymax.
+ *
+ * \warning This function assumes that the framebuffer dimensions are up to
+ * date (e.g., update_framebuffer_size has been recently called on \c buffer).
+ *
+ * \sa _mesa_clip_to_region
+ */
+void
+_mesa_scissor_bounding_box(const struct gl_context *ctx,
+ const struct gl_framebuffer *buffer,
+ unsigned idx, int *bbox)
+{
+ bbox[0] = 0;
+ bbox[2] = 0;
+ bbox[1] = buffer->Width;
+ bbox[3] = buffer->Height;
+
+ if (ctx->Scissor.EnableFlags & (1u << idx)) {
+ if (ctx->Scissor.ScissorArray[idx].X > bbox[0]) {
+ bbox[0] = ctx->Scissor.ScissorArray[idx].X;
+ }
+ if (ctx->Scissor.ScissorArray[idx].Y > bbox[2]) {
+ bbox[2] = ctx->Scissor.ScissorArray[idx].Y;
+ }
+ if (ctx->Scissor.ScissorArray[idx].X + ctx->Scissor.ScissorArray[idx].Width < bbox[1]) {
+ bbox[1] = ctx->Scissor.ScissorArray[idx].X + ctx->Scissor.ScissorArray[idx].Width;
+ }
+ if (ctx->Scissor.ScissorArray[idx].Y + ctx->Scissor.ScissorArray[idx].Height < bbox[3]) {
+ bbox[3] = ctx->Scissor.ScissorArray[idx].Y + ctx->Scissor.ScissorArray[idx].Height;
+ }
+ /* finally, check for empty region */
+ if (bbox[0] > bbox[1]) {
+ bbox[0] = bbox[1];
+ }
+ if (bbox[2] > bbox[3]) {
+ bbox[2] = bbox[3];
+ }
+ }
+
+ assert(bbox[0] <= bbox[1]);
+ assert(bbox[2] <= bbox[3]);
+}
+
/**
* Update the context's current drawing buffer's Xmin, Xmax, Ymin, Ymax fields.
* These values are computed from the buffer's width and height and
_mesa_update_draw_buffer_bounds(struct gl_context *ctx)
{
struct gl_framebuffer *buffer = ctx->DrawBuffer;
+ int bbox[4];
if (!buffer)
return;
- if (buffer->Name) {
+ if (_mesa_is_user_fbo(buffer)) {
/* user-created framebuffer size depends on the renderbuffers */
update_framebuffer_size(ctx, buffer);
}
- buffer->_Xmin = 0;
- buffer->_Ymin = 0;
- buffer->_Xmax = buffer->Width;
- buffer->_Ymax = buffer->Height;
-
- if (ctx->Scissor.Enabled) {
- if (ctx->Scissor.X > buffer->_Xmin) {
- buffer->_Xmin = ctx->Scissor.X;
- }
- if (ctx->Scissor.Y > buffer->_Ymin) {
- buffer->_Ymin = ctx->Scissor.Y;
- }
- if (ctx->Scissor.X + ctx->Scissor.Width < buffer->_Xmax) {
- buffer->_Xmax = ctx->Scissor.X + ctx->Scissor.Width;
- }
- if (ctx->Scissor.Y + ctx->Scissor.Height < buffer->_Ymax) {
- buffer->_Ymax = ctx->Scissor.Y + ctx->Scissor.Height;
- }
- /* finally, check for empty region */
- if (buffer->_Xmin > buffer->_Xmax) {
- buffer->_Xmin = buffer->_Xmax;
- }
- if (buffer->_Ymin > buffer->_Ymax) {
- buffer->_Ymin = buffer->_Ymax;
- }
- }
-
- ASSERT(buffer->_Xmin <= buffer->_Xmax);
- ASSERT(buffer->_Ymin <= buffer->_Ymax);
+ /* Default to the first scissor as that's always valid */
+ _mesa_scissor_bounding_box(ctx, buffer, 0, bbox);
+ buffer->_Xmin = bbox[0];
+ buffer->_Ymin = bbox[2];
+ buffer->_Xmax = bbox[1];
+ buffer->_Ymax = bbox[3];
}
if (fb->Attachment[i].Renderbuffer) {
const struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
- const gl_format fmt = rb->Format;
+ const mesa_format fmt = rb->Format;
+
+ /* Grab samples and sampleBuffers from any attachment point (assuming
+ * the framebuffer is complete, we'll get the same answer from all
+ * attachments).
+ */
+ fb->Visual.samples = rb->NumSamples;
+ fb->Visual.sampleBuffers = rb->NumSamples > 0 ? 1 : 0;
if (_mesa_is_legal_color_format(ctx, baseFormat)) {
fb->Visual.redBits = _mesa_get_format_bits(fmt, GL_RED_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;
- fb->Visual.samples = rb->NumSamples;
+ if (_mesa_get_format_color_encoding(fmt) == GL_SRGB)
+ fb->Visual.sRGBCapable = ctx->Extensions.EXT_framebuffer_sRGB;
+ break;
+ }
+ }
+ }
+
+ fb->Visual.floatMode = GL_FALSE;
+ for (i = 0; i < BUFFER_COUNT; i++) {
+ if (fb->Attachment[i].Renderbuffer) {
+ const struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
+ const mesa_format fmt = rb->Format;
+
+ if (_mesa_get_format_datatype(fmt) == GL_FLOAT) {
+ fb->Visual.floatMode = GL_TRUE;
break;
}
}
if (fb->Attachment[BUFFER_DEPTH].Renderbuffer) {
const struct gl_renderbuffer *rb =
fb->Attachment[BUFFER_DEPTH].Renderbuffer;
- const gl_format fmt = rb->Format;
+ const mesa_format fmt = rb->Format;
fb->Visual.haveDepthBuffer = GL_TRUE;
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;
+ const mesa_format fmt = rb->Format;
fb->Visual.haveStencilBuffer = GL_TRUE;
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;
+ const mesa_format fmt = rb->Format;
fb->Visual.haveAccumBuffer = GL_TRUE;
fb->Visual.accumRedBits = _mesa_get_format_bits(fmt, GL_RED_BITS);
fb->Visual.accumGreenBits = _mesa_get_format_bits(fmt, GL_GREEN_BITS);
}
-/**
- * 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_depth_buffer(struct gl_context *ctx,
- struct gl_framebuffer *fb,
- GLuint attIndex)
-{
- struct gl_renderbuffer *depthRb;
-
- /* only one possiblity for now */
- ASSERT(attIndex == BUFFER_DEPTH);
-
- depthRb = fb->Attachment[attIndex].Renderbuffer;
-
- 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
- || _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);
- _mesa_reference_renderbuffer(&fb->_DepthBuffer, wrapper);
- ASSERT(fb->_DepthBuffer->Wrapped == depthRb);
- }
- }
- else {
- /* depthRb may be null */
- _mesa_reference_renderbuffer(&fb->_DepthBuffer, depthRb);
- }
-}
-
-
-/**
- * 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(struct gl_context *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 && _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
- || _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);
- _mesa_reference_renderbuffer(&fb->_StencilBuffer, wrapper);
- ASSERT(fb->_StencilBuffer->Wrapped == stencilRb);
- }
- }
- else {
- /* stencilRb may be null */
- _mesa_reference_renderbuffer(&fb->_StencilBuffer, stencilRb);
- }
-}
-
-
/*
* Example DrawBuffers scenarios:
*
fb->_ColorReadBuffer = NULL; /* legal! */
}
else {
- ASSERT(fb->_ColorReadBufferIndex >= 0);
- ASSERT(fb->_ColorReadBufferIndex < BUFFER_COUNT);
+ assert(fb->_ColorReadBufferIndex >= 0);
+ assert(fb->_ColorReadBufferIndex < BUFFER_COUNT);
fb->_ColorReadBuffer
= fb->Attachment[fb->_ColorReadBufferIndex].Renderbuffer;
}
* _ColorDrawBuffers
* _NumColorDrawBuffers
* _ColorReadBuffer
- * _DepthBuffer
- * _StencilBuffer
*
* If the framebuffer is user-created, make sure it's complete.
*
static void
update_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
{
- if (fb->Name == 0) {
+ if (_mesa_is_winsys_fbo(fb)) {
/* This is a window-system framebuffer */
/* Need to update the FB's GL_DRAW_BUFFER state to match the
* context state (GL_READ_BUFFER too).
_mesa_drawbuffers(ctx, ctx->Const.MaxDrawBuffers,
ctx->Color.DrawBuffer, NULL);
}
- if (fb->ColorReadBuffer != ctx->Pixel.ReadBuffer) {
-
- }
}
else {
/* This is a user-created framebuffer.
*/
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_framebuffer(ctx, drawFb);
if (readFb != drawFb)
update_framebuffer(ctx, readFb);
+
+ _mesa_update_clamp_vertex_color(ctx);
+ _mesa_update_clamp_fragment_color(ctx);
}
/**
- * Check if the renderbuffer for a read operation (glReadPixels, glCopyPixels,
- * glCopyTex[Sub]Image, etc) exists.
+ * Check if the renderbuffer for a read/draw operation 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.
+ * \param reading if TRUE, we're going to read from the buffer,
+ if FALSE, we're going to write to the buffer.
* \return GL_TRUE if buffer exists, GL_FALSE otherwise
*/
-GLboolean
-_mesa_source_buffer_exists(struct gl_context *ctx, GLenum format)
+static GLboolean
+renderbuffer_exists(struct gl_context *ctx,
+ struct gl_framebuffer *fb,
+ GLenum format,
+ GLboolean reading)
{
- const struct gl_renderbuffer_attachment *att = ctx->ReadBuffer->Attachment;
+ const struct gl_renderbuffer_attachment *att = fb->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 (fb->_Status == 0) {
+ _mesa_test_framebuffer_completeness(ctx, fb);
}
- if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
return GL_FALSE;
}
case GL_RGBA:
case GL_BGRA:
case GL_ABGR_EXT:
- case GL_COLOR_INDEX:
case GL_RED_INTEGER_EXT:
+ case GL_RG_INTEGER:
case GL_GREEN_INTEGER_EXT:
case GL_BLUE_INTEGER_EXT:
case GL_ALPHA_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;
+ if (reading) {
+ /* about to read from a color buffer */
+ const struct gl_renderbuffer *readBuf = fb->_ColorReadBuffer;
+ if (!readBuf) {
+ return GL_FALSE;
+ }
+ assert(_mesa_get_format_bits(readBuf->Format, GL_RED_BITS) > 0 ||
+ _mesa_get_format_bits(readBuf->Format, GL_ALPHA_BITS) > 0 ||
+ _mesa_get_format_bits(readBuf->Format, GL_TEXTURE_LUMINANCE_SIZE) > 0 ||
+ _mesa_get_format_bits(readBuf->Format, GL_TEXTURE_INTENSITY_SIZE) > 0 ||
+ _mesa_get_format_bits(readBuf->Format, GL_INDEX_BITS) > 0);
+ }
+ else {
+ /* about to draw to zero or more color buffers (none is OK) */
+ return GL_TRUE;
}
- 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) {
+ if (att[BUFFER_DEPTH].Type == GL_NONE) {
return GL_FALSE;
}
- /*ASSERT(att[BUFFER_DEPTH].Renderbuffer->DepthBits > 0);*/
break;
case GL_STENCIL:
case GL_STENCIL_INDEX:
- if (!att[BUFFER_STENCIL].Renderbuffer) {
+ if (att[BUFFER_STENCIL].Type == GL_NONE) {
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) {
+ if (att[BUFFER_DEPTH].Type == GL_NONE ||
+ att[BUFFER_STENCIL].Type == GL_NONE) {
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 renderbuffer_exists",
format);
return GL_FALSE;
}
}
+/**
+ * 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(struct gl_context *ctx, GLenum format)
+{
+ return renderbuffer_exists(ctx, ctx->ReadBuffer, format, GL_TRUE);
+}
+
+
/**
* As above, but for drawing operations.
- * XXX could do some code merging w/ above function.
*/
GLboolean
_mesa_dest_buffer_exists(struct gl_context *ctx, GLenum format)
{
- const struct gl_renderbuffer_attachment *att = ctx->DrawBuffer->Attachment;
+ return renderbuffer_exists(ctx, ctx->DrawBuffer, format, GL_FALSE);
+}
- /* 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;
+/**
+ * Used to answer the GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES query.
+ */
+GLenum
+_mesa_get_color_read_format(struct gl_context *ctx)
+{
+ if (!ctx->ReadBuffer || !ctx->ReadBuffer->_ColorReadBuffer) {
+ /* The spec is unclear how to handle this case, but NVIDIA's
+ * driver generates GL_INVALID_OPERATION.
+ */
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_FORMAT: "
+ "no GL_READ_BUFFER)");
+ return GL_NONE;
}
+ else {
+ const GLenum format = ctx->ReadBuffer->_ColorReadBuffer->Format;
+ const GLenum data_type = _mesa_get_format_datatype(format);
- 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:
- 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:
- 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;
+ if (format == MESA_FORMAT_B8G8R8A8_UNORM)
+ return GL_BGRA;
+ else if (format == MESA_FORMAT_B5G6R5_UNORM)
+ return GL_BGR;
+
+ switch (data_type) {
+ case GL_UNSIGNED_INT:
+ case GL_INT:
+ return GL_RGBA_INTEGER;
+ default:
+ return GL_RGBA;
}
- /*
- 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_dest_buffer_exists",
- format);
- return GL_FALSE;
}
-
- /* OK */
- return GL_TRUE;
}
/**
- * Used to answer the GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES query.
+ * Used to answer the GL_IMPLEMENTATION_COLOR_READ_TYPE_OES query.
*/
GLenum
-_mesa_get_color_read_format(struct gl_context *ctx)
+_mesa_get_color_read_type(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;
+ if (!ctx->ReadBuffer || !ctx->ReadBuffer->_ColorReadBuffer) {
+ /* The spec is unclear how to handle this case, but NVIDIA's
+ * driver generates GL_INVALID_OPERATION.
+ */
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetIntegerv(GL_IMPLEMENTATION_COLOR_READ_TYPE: "
+ "no GL_READ_BUFFER)");
+ return GL_NONE;
+ }
+ else {
+ const GLenum format = ctx->ReadBuffer->_ColorReadBuffer->Format;
+ const GLenum data_type = _mesa_get_format_datatype(format);
+
+ if (format == MESA_FORMAT_B5G6R5_UNORM)
+ return GL_UNSIGNED_SHORT_5_6_5_REV;
+
+ switch (data_type) {
+ case GL_SIGNED_NORMALIZED:
+ return GL_BYTE;
+ case GL_UNSIGNED_INT:
+ case GL_INT:
+ case GL_FLOAT:
+ return data_type;
+ case GL_UNSIGNED_NORMALIZED:
+ default:
+ return GL_UNSIGNED_BYTE;
+ }
}
}
/**
- * Used to answer the GL_IMPLEMENTATION_COLOR_READ_TYPE_OES query.
+ * Returns the read renderbuffer for the specified format.
*/
-GLenum
-_mesa_get_color_read_type(struct gl_context *ctx)
+struct gl_renderbuffer *
+_mesa_get_read_renderbuffer_for_format(const struct gl_context *ctx,
+ GLenum format)
{
- 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;
+ const struct gl_framebuffer *rfb = ctx->ReadBuffer;
+
+ if (_mesa_is_color_format(format)) {
+ return rfb->Attachment[rfb->_ColorReadBufferIndex].Renderbuffer;
+ } else if (_mesa_is_depth_format(format) ||
+ _mesa_is_depthstencil_format(format)) {
+ return rfb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ } else {
+ return rfb->Attachment[BUFFER_STENCIL].Renderbuffer;
}
}
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;
+ const struct gl_texture_image *texImage = att->Renderbuffer->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));
projects / mesa.git / blobdiff