X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fframebuffer.c;h=2fad45880668f047afbdcad8c19bcebdf8a20255;hb=43b05b8fac68784bc8d61851125bd49783e5ebd0;hp=a98c09cfbf3411d8c762ac644f20714fc62ce394;hpb=222d2f2ac2c7d93cbc0643082c78278ad2c8cfce;p=mesa.git diff --git a/src/mesa/main/framebuffer.c b/src/mesa/main/framebuffer.c index a98c09cfbf3..2fad4588066 100644 --- a/src/mesa/main/framebuffer.c +++ b/src/mesa/main/framebuffer.c @@ -1,6 +1,5 @@ /* * Mesa 3-D graphics library - * Version: 7.2 * * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. * @@ -17,9 +16,10 @@ * 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. */ @@ -32,9 +32,9 @@ #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" @@ -43,6 +43,7 @@ #include "framebuffer.h" #include "renderbuffer.h" #include "texobj.h" +#include "glformats.h" @@ -83,7 +84,7 @@ compute_depth_max(struct gl_framebuffer *fb) * \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); @@ -102,7 +103,7 @@ _mesa_create_framebuffer(const GLvisual *visual) * \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; @@ -122,7 +123,7 @@ _mesa_new_framebuffer(GLcontext *ctx, GLuint name) */ void _mesa_initialize_window_framebuffer(struct gl_framebuffer *fb, - const GLvisual *visual) + const struct gl_config *visual) { assert(fb); assert(visual); @@ -154,6 +155,8 @@ _mesa_initialize_window_framebuffer(struct gl_framebuffer *fb, fb->Delete = _mesa_destroy_framebuffer; fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT; + fb->_AllColorBuffersFixedPoint = !visual->floatMode; + fb->_HasSNormOrFloatColorBuffer = visual->floatMode; compute_depth_max(fb); } @@ -192,6 +195,7 @@ _mesa_destroy_framebuffer(struct gl_framebuffer *fb) { if (fb) { _mesa_free_framebuffer_data(fb); + free(fb->Label); free(fb); } } @@ -223,26 +227,18 @@ _mesa_free_framebuffer_data(struct gl_framebuffer *fb) 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; @@ -281,7 +277,7 @@ _mesa_reference_framebuffer(struct gl_framebuffer **ptr, * 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; @@ -290,8 +286,8 @@ _mesa_resize_framebuffer(GLcontext *ctx, struct gl_framebuffer *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]; @@ -311,24 +307,6 @@ _mesa_resize_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb, } } - 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; @@ -342,85 +320,6 @@ _mesa_resize_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb, } } - - -/** - * 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( GLcontext *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; - GLframebuffer *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; - GLframebuffer *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 @@ -429,13 +328,13 @@ _mesa_ResizeBuffersMESA( void ) * window-system framebuffes. */ static void -update_framebuffer_size(GLcontext *ctx, struct gl_framebuffer *fb) +update_framebuffer_size(struct gl_context *ctx, struct gl_framebuffer *fb) { GLuint minWidth = ~0, minHeight = ~0; 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]; @@ -464,14 +363,14 @@ update_framebuffer_size(GLcontext *ctx, struct gl_framebuffer *fb) * \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) return; - if (buffer->Name) { + if (_mesa_is_user_fbo(buffer)) { /* user-created framebuffer size depends on the renderbuffers */ update_framebuffer_size(ctx, buffer); } @@ -522,7 +421,8 @@ _mesa_update_draw_buffer_bounds(GLcontext *ctx) * 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; @@ -542,17 +442,36 @@ _mesa_update_framebuffer_visual(struct gl_framebuffer *fb) 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; - - if (baseFormat == GL_RGBA || baseFormat == GL_RGB || - baseFormat == GL_ALPHA) { + + /* 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.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; - 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 gl_format fmt = rb->Format; + + if (_mesa_get_format_datatype(fmt) == GL_FLOAT) { + fb->Visual.floatMode = GL_TRUE; break; } } @@ -589,88 +508,6 @@ _mesa_update_framebuffer_visual(struct gl_framebuffer *fb) } -/** - * 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(GLcontext *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(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 && _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: * @@ -722,7 +559,7 @@ _mesa_update_stencil_buffer(GLcontext *ctx, * 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; @@ -746,7 +583,7 @@ update_color_draw_buffers(GLcontext *ctx, struct gl_framebuffer *fb) * 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 || @@ -771,8 +608,6 @@ update_color_read_buffer(GLcontext *ctx, struct gl_framebuffer *fb) * _ColorDrawBuffers * _NumColorDrawBuffers * _ColorReadBuffer - * _DepthBuffer - * _StencilBuffer * * If the framebuffer is user-created, make sure it's complete. * @@ -781,9 +616,9 @@ update_color_read_buffer(GLcontext *ctx, struct gl_framebuffer *fb) * 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) { + 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). @@ -792,9 +627,6 @@ update_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb) _mesa_drawbuffers(ctx, ctx->Const.MaxDrawBuffers, ctx->Color.DrawBuffer, NULL); } - if (fb->ColorReadBuffer != ctx->Pixel.ReadBuffer) { - - } } else { /* This is a user-created framebuffer. @@ -812,8 +644,6 @@ update_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb) */ 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); } @@ -823,7 +653,7 @@ update_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb) * 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; struct gl_framebuffer *readFb; @@ -835,27 +665,34 @@ _mesa_update_framebuffer(GLcontext *ctx) 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(GLcontext *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; } @@ -868,46 +705,61 @@ _mesa_source_buffer_exists(GLcontext *ctx, GLenum format) 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: - if (ctx->ReadBuffer->_ColorReadBuffer == NULL) { - return GL_FALSE; + 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_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 (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; } @@ -917,108 +769,118 @@ _mesa_source_buffer_exists(GLcontext *ctx, GLenum format) } +/** + * 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(GLcontext *ctx, GLenum format) +_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: - /* 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_ARGB8888) + return GL_BGRA; + else if (format == MESA_FORMAT_RGB565) + 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(GLcontext *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_RGB565) + 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(GLcontext *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; } } @@ -1039,12 +901,11 @@ _mesa_print_framebuffer(const struct gl_framebuffer *fb) 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));