diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/main/framebuffer.c')
| -rw-r--r-- | nx-X11/extras/Mesa/src/mesa/main/framebuffer.c | 528 |
1 files changed, 0 insertions, 528 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/main/framebuffer.c b/nx-X11/extras/Mesa/src/mesa/main/framebuffer.c deleted file mode 100644 index de44d1a85..000000000 --- a/nx-X11/extras/Mesa/src/mesa/main/framebuffer.c +++ /dev/null @@ -1,528 +0,0 @@ -/* - * Mesa 3-D graphics library - * Version: 6.4 - * - * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * 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. - */ - - -/** - * Functions for allocating/managing framebuffers and renderbuffers. - * Also, routines for reading/writing renderbuffer data as ubytes, - * ushorts, uints, etc. - */ - - -#include "glheader.h" -#include "imports.h" -#include "context.h" -#include "mtypes.h" -#include "fbobject.h" -#include "framebuffer.h" -#include "renderbuffer.h" - - - -/** - * Compute/set the _DepthMax field for the given framebuffer. - * This value depends on the Z buffer resolution. - */ -static void -compute_depth_max(struct gl_framebuffer *fb) -{ - if (fb->Visual.depthBits == 0) { - /* Special case. Even if we don't have a depth buffer we need - * good values for DepthMax for Z vertex transformation purposes - * and for per-fragment fog computation. - */ - fb->_DepthMax = (1 << 16) - 1; - } - else if (fb->Visual.depthBits < 32) { - fb->_DepthMax = (1 << fb->Visual.depthBits) - 1; - } - else { - /* Special case since shift values greater than or equal to the - * number of bits in the left hand expression's type are undefined. - */ - fb->_DepthMax = 0xffffffff; - } - fb->_DepthMaxF = (GLfloat) fb->_DepthMax; - fb->_MRD = 1.0; /* Minimum resolvable depth value, for polygon offset */ -} - - -/** - * Create and initialize a gl_framebuffer object. - * This is intended for creating _window_system_ framebuffers, not generic - * framebuffer objects ala GL_EXT_framebuffer_object. - * - * \sa _mesa_new_framebuffer - */ -struct gl_framebuffer * -_mesa_create_framebuffer(const GLvisual *visual) -{ - struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer); - assert(visual); - if (fb) { - _mesa_initialize_framebuffer(fb, visual); - } - return fb; -} - - -/** - * Allocate a new gl_framebuffer object. - * This is the default function for ctx->Driver.NewFramebuffer(). - * This is for allocating user-created framebuffers, not window-system - * framebuffers! - * \sa _mesa_create_framebuffer - */ -struct gl_framebuffer * -_mesa_new_framebuffer(GLcontext *ctx, GLuint name) -{ - struct gl_framebuffer *fb; - assert(name != 0); - fb = CALLOC_STRUCT(gl_framebuffer); - if (fb) { - fb->Name = name; - fb->RefCount = 1; - fb->Delete = _mesa_destroy_framebuffer; - fb->ColorDrawBuffer[0] = GL_COLOR_ATTACHMENT0_EXT; - fb->_ColorDrawBufferMask[0] = BUFFER_BIT_COLOR0; - fb->ColorReadBuffer = GL_COLOR_ATTACHMENT0_EXT; - fb->_ColorReadBufferMask = BUFFER_BIT_COLOR0; - fb->Delete = _mesa_destroy_framebuffer; - } - return fb; -} - - -/** - * Initialize a gl_framebuffer object. - * \sa _mesa_create_framebuffer - */ -void -_mesa_initialize_framebuffer(struct gl_framebuffer *fb, const GLvisual *visual) -{ - assert(fb); - assert(visual); - - _mesa_bzero(fb, sizeof(struct gl_framebuffer)); - - /* save the visual */ - fb->Visual = *visual; - - /* Init glRead/DrawBuffer state */ - if (visual->doubleBufferMode) { - fb->ColorDrawBuffer[0] = GL_BACK; - fb->_ColorDrawBufferMask[0] = BUFFER_BIT_BACK_LEFT; - fb->ColorReadBuffer = GL_BACK; - fb->_ColorReadBufferMask = BUFFER_BIT_BACK_LEFT; - } - else { - fb->ColorDrawBuffer[0] = GL_FRONT; - fb->_ColorDrawBufferMask[0] = BUFFER_BIT_FRONT_LEFT; - fb->ColorReadBuffer = GL_FRONT; - fb->_ColorReadBufferMask = BUFFER_BIT_FRONT_LEFT; - } - - fb->Delete = _mesa_destroy_framebuffer; - fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT; - - compute_depth_max(fb); -} - - -/** - * Create/attach software-based renderbuffers to the given framebuffer. - * This is a helper routine for device drivers. Drivers can just as well - * call the individual _mesa_add_*_renderbuffer() routines directly. - */ -void -_mesa_add_soft_renderbuffers(struct gl_framebuffer *fb, - GLboolean color, - GLboolean depth, - GLboolean stencil, - GLboolean accum, - GLboolean alpha, - GLboolean aux) -{ - GLboolean frontLeft = GL_TRUE; - GLboolean backLeft = fb->Visual.doubleBufferMode; - GLboolean frontRight = fb->Visual.stereoMode; - GLboolean backRight = fb->Visual.stereoMode && fb->Visual.doubleBufferMode; - - if (color) { - if (fb->Visual.rgbMode) { - assert(fb->Visual.redBits == fb->Visual.greenBits); - assert(fb->Visual.redBits == fb->Visual.blueBits); - _mesa_add_color_renderbuffers(NULL, fb, - fb->Visual.redBits, - fb->Visual.alphaBits, - frontLeft, backLeft, - frontRight, backRight); - } - else { - _mesa_add_color_index_renderbuffers(NULL, fb, - fb->Visual.indexBits, - frontLeft, backLeft, - frontRight, backRight); - } - } - - if (depth) { - assert(fb->Visual.depthBits > 0); - _mesa_add_depth_renderbuffer(NULL, fb, fb->Visual.depthBits); - } - - if (stencil) { - assert(fb->Visual.stencilBits > 0); - _mesa_add_stencil_renderbuffer(NULL, fb, fb->Visual.stencilBits); - } - - if (accum) { - assert(fb->Visual.rgbMode); - assert(fb->Visual.accumRedBits > 0); - assert(fb->Visual.accumGreenBits > 0); - assert(fb->Visual.accumBlueBits > 0); - _mesa_add_accum_renderbuffer(NULL, fb, - fb->Visual.accumRedBits, - fb->Visual.accumGreenBits, - fb->Visual.accumBlueBits, - fb->Visual.accumAlphaBits); - } - - if (aux) { - assert(fb->Visual.rgbMode); - assert(fb->Visual.numAuxBuffers > 0); - _mesa_add_aux_renderbuffers(NULL, fb, fb->Visual.redBits, - fb->Visual.numAuxBuffers); - } - -#if 1 - if (alpha) { - assert(fb->Visual.rgbMode); - assert(fb->Visual.alphaBits > 0); - _mesa_add_alpha_renderbuffers(NULL, fb, fb->Visual.alphaBits, - frontLeft, backLeft, - frontRight, backRight); - } -#endif - -#if 0 - if (multisample) { - /* maybe someday */ - } -#endif -} - - -/** - * Deallocate buffer and everything attached to it. - */ -void -_mesa_destroy_framebuffer(struct gl_framebuffer *buffer) -{ - if (buffer) { - _mesa_free_framebuffer_data(buffer); - FREE(buffer); - } -} - - -/** - * Free all the data hanging off the given gl_framebuffer, but don't free - * the gl_framebuffer object itself. - */ -void -_mesa_free_framebuffer_data(struct gl_framebuffer *fb) -{ - GLuint i; - - assert(fb); - - 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); - } - } - att->Type = GL_NONE; - att->Renderbuffer = 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() - */ -void -_mesa_resize_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb, - GLuint width, GLuint height) -{ - GLuint i; - - /* For window system framebuffers, Name is zero */ - assert(fb->Name == 0); - - 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; - /* only resize if size is changing */ - if (rb->Width != width || rb->Height != height) { - if (rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height)) { - rb->Width = width; - rb->Height = height; - } - else { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "Resizing framebuffer"); - } - } - } - } - - fb->Width = width; - fb->Height = height; - - /* to update scissor / window bounds */ - if (ctx) - ctx->NewState |= _NEW_BUFFERS; -} - - -/** - * 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. - * Note: this is only intended for user-created framebuffers, not - * window-system framebuffes. - */ -static void -update_framebuffer_size(struct gl_framebuffer *fb) -{ - GLboolean haveSize = GL_FALSE; - GLuint i; - - /* user-created framebuffers only */ - assert(fb->Name); - - for (i = 0; i < BUFFER_COUNT; i++) { - 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; - } - } - } -} - - -/** - * 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 - * the scissor box, if it's enabled. - * \param ctx the GL context. - */ -void -_mesa_update_draw_buffer_bounds(GLcontext *ctx) -{ - struct gl_framebuffer *buffer = ctx->DrawBuffer; - - if (buffer->Name) { - /* user-created framebuffer size depends on the renderbuffers */ - update_framebuffer_size(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); -} - - -/** - * The glGet queries of the framebuffer red/green/blue size, stencil size, - * etc. are satisfied by the fields of ctx->DrawBuffer->Visual. These can - * change depending on the renderbuffer bindings. This function update's - * the given framebuffer's Visual from the current renderbuffer bindings. - * This is only intended for user-created framebuffers. - */ -void -_mesa_update_framebuffer_visual(struct gl_framebuffer *fb) -{ - GLuint i; - - assert(fb->Name != 0); - - _mesa_bzero(&fb->Visual, sizeof(fb->Visual)); - fb->Visual.rgbMode = GL_TRUE; - - /* find first RGB or CI 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->ComponentSizes[0]; - fb->Visual.greenBits = rb->ComponentSizes[1]; - fb->Visual.blueBits = rb->ComponentSizes[2]; - fb->Visual.alphaBits = rb->ComponentSizes[3]; - fb->Visual.floatMode = GL_FALSE; - break; - } - else if (rb->_BaseFormat == GL_COLOR_INDEX) { - fb->Visual.indexBits = rb->ComponentSizes[0]; - fb->Visual.rgbMode = GL_FALSE; - break; - } - } - } - - if (fb->Attachment[BUFFER_DEPTH].Renderbuffer) { - fb->Visual.haveDepthBuffer = GL_TRUE; - fb->Visual.depthBits - = fb->Attachment[BUFFER_DEPTH].Renderbuffer->ComponentSizes[0]; - } - - if (fb->Attachment[BUFFER_STENCIL].Renderbuffer) { - fb->Visual.haveStencilBuffer = GL_TRUE; - fb->Visual.stencilBits - = fb->Attachment[BUFFER_STENCIL].Renderbuffer->ComponentSizes[0]; - } - - compute_depth_max(fb); -} - - -/** - * Given a framebuffer and a buffer bit (like BUFFER_BIT_FRONT_LEFT), return - * the corresponding renderbuffer. - */ -static struct gl_renderbuffer * -get_renderbuffer(struct gl_framebuffer *fb, GLuint bufferBit) -{ - GLuint index; - for (index = 0; index < BUFFER_COUNT; index++) { - if ((1 << index) == bufferBit) { - return fb->Attachment[index].Renderbuffer; - } - } - _mesa_problem(NULL, "Bad bufferBit in get_renderbuffer"); - return NULL; -} - - -/** - * Update state related to the current draw/read framebuffers. - * If the current framebuffer is user-created, make sure it's complete. - */ -void -_mesa_update_framebuffer(GLcontext *ctx) -{ - struct gl_framebuffer *fb = ctx->DrawBuffer; - GLuint output; - - /* Completeness only matters for user-created framebuffers */ - if (fb->Name != 0) { - _mesa_test_framebuffer_completeness(ctx, fb); - _mesa_update_framebuffer_visual(fb); - } - - /* - * Update the list of drawing renderbuffer pointers. - * Later, when we're rendering we'll loop from 0 to _NumColorDrawBuffers - * writing colors. We have a loop because glDrawBuffer(GL_FRONT_AND_BACK) - * can specify writing to two or four color buffers. - */ - for (output = 0; output < ctx->Const.MaxDrawBuffers; output++) { - GLuint bufferMask = fb->_ColorDrawBufferMask[output]; - GLuint count = 0; - GLuint bufferBit; - /* for each bit that's set in the bufferMask... */ - for (bufferBit = 1; bufferMask; bufferBit <<= 1) { - if (bufferBit & bufferMask) { - struct gl_renderbuffer *rb = get_renderbuffer(fb, bufferBit); - if (rb) { - fb->_ColorDrawBuffers[output][count] = rb; - fb->_ColorDrawBit[output][count] = bufferBit; - count++; - } - else { - /*_mesa_warning(ctx, "DrawBuffer names a missing buffer!");*/ - } - bufferMask &= ~bufferBit; - } - } - fb->_NumColorDrawBuffers[output] = count; - } - - /* - * Update the read renderbuffer pointer. - * Unlike the DrawBuffer, we can only read from one (or zero) color buffers. - */ - if (fb->_ColorReadBufferMask == 0x0) - fb->_ColorReadBuffer = NULL; /* legal! */ - else - fb->_ColorReadBuffer = get_renderbuffer(fb, fb->_ColorReadBufferMask); - - compute_depth_max(fb); -} |