X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fbuffers.c;h=b23d2f612bfdef278fcfb6818fcffb34ef160e01;hb=08d90fe8a5e12d92994c05b2ec9f68ab7232275c;hp=c280f89e1d1ba15e0735ec25d102fed5747fb335;hpb=4fe48b4e8568896cdbc822323aeec0a41c72ff2a;p=mesa.git diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c index c280f89e1d1..b23d2f612bf 100644 --- a/src/mesa/main/buffers.c +++ b/src/mesa/main/buffers.c @@ -25,7 +25,7 @@ /** * \file buffers.c - * General framebuffer-related functions, like glClear, glScissor, etc. + * glReadBuffer, DrawBuffer functions. */ @@ -42,146 +42,6 @@ #define BAD_MASK ~0u -#if _HAVE_FULL_GL -void GLAPIENTRY -_mesa_ClearIndex( GLfloat c ) -{ - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END(ctx); - - if (ctx->Color.ClearIndex == (GLuint) c) - return; - - FLUSH_VERTICES(ctx, _NEW_COLOR); - ctx->Color.ClearIndex = (GLuint) c; - - if (!ctx->Visual.rgbMode && ctx->Driver.ClearIndex) { - /* it's OK to call glClearIndex in RGBA mode but it should be a NOP */ - (*ctx->Driver.ClearIndex)( ctx, ctx->Color.ClearIndex ); - } -} -#endif - - -/** - * Specify the clear values for the color buffers. - * - * \param red red color component. - * \param green green color component. - * \param blue blue color component. - * \param alpha alpha component. - * - * \sa glClearColor(). - * - * Clamps the parameters and updates gl_colorbuffer_attrib::ClearColor. On a - * change, flushes the vertices and notifies the driver via the - * dd_function_table::ClearColor callback. - */ -void GLAPIENTRY -_mesa_ClearColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha ) -{ - GLfloat tmp[4]; - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END(ctx); - - tmp[0] = CLAMP(red, 0.0F, 1.0F); - tmp[1] = CLAMP(green, 0.0F, 1.0F); - tmp[2] = CLAMP(blue, 0.0F, 1.0F); - tmp[3] = CLAMP(alpha, 0.0F, 1.0F); - - if (TEST_EQ_4V(tmp, ctx->Color.ClearColor)) - return; /* no change */ - - FLUSH_VERTICES(ctx, _NEW_COLOR); - COPY_4V(ctx->Color.ClearColor, tmp); - - if (ctx->Visual.rgbMode && ctx->Driver.ClearColor) { - /* it's OK to call glClearColor in CI mode but it should be a NOP */ - (*ctx->Driver.ClearColor)(ctx, ctx->Color.ClearColor); - } -} - - -/** - * Clear buffers. - * - * \param mask bit-mask indicating the buffers to be cleared. - * - * Flushes the vertices and verifies the parameter. If __GLcontextRec::NewState - * is set then calls _mesa_update_state() to update gl_frame_buffer::_Xmin, - * etc. If the rasterization mode is set to GL_RENDER then requests the driver - * to clear the buffers, via the dd_function_table::Clear callback. - */ -void GLAPIENTRY -_mesa_Clear( GLbitfield mask ) -{ - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); - - if (MESA_VERBOSE & VERBOSE_API) - _mesa_debug(ctx, "glClear 0x%x\n", mask); - - if (mask & ~(GL_COLOR_BUFFER_BIT | - GL_DEPTH_BUFFER_BIT | - GL_STENCIL_BUFFER_BIT | - GL_ACCUM_BUFFER_BIT)) { - /* invalid bit set */ - _mesa_error( ctx, GL_INVALID_VALUE, "glClear(0x%x)", mask); - return; - } - - if (ctx->NewState) { - _mesa_update_state( ctx ); /* update _Xmin, etc */ - } - - if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { - _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, - "glClear(incomplete framebuffer)"); - return; - } - - if (ctx->DrawBuffer->Width == 0 || ctx->DrawBuffer->Height == 0) - return; - - if (ctx->RenderMode == GL_RENDER) { - GLbitfield bufferMask; - - /* don't clear depth buffer if depth writing disabled */ - if (!ctx->Depth.Mask) - mask &= ~GL_DEPTH_BUFFER_BIT; - - /* Build the bitmask to send to device driver's Clear function. - * Note that the GL_COLOR_BUFFER_BIT flag will expand to 0, 1, 2 or 4 - * of the BUFFER_BIT_FRONT/BACK_LEFT/RIGHT flags, or one of the - * BUFFER_BIT_COLORn flags. - */ - bufferMask = 0; - if (mask & GL_COLOR_BUFFER_BIT) { - bufferMask |= ctx->DrawBuffer->_ColorDrawBufferMask[0]; - } - - if ((mask & GL_DEPTH_BUFFER_BIT) - && ctx->DrawBuffer->Visual.haveDepthBuffer) { - bufferMask |= BUFFER_BIT_DEPTH; - } - - if ((mask & GL_STENCIL_BUFFER_BIT) - && ctx->DrawBuffer->Visual.haveStencilBuffer) { - bufferMask |= BUFFER_BIT_STENCIL; - } - - if ((mask & GL_ACCUM_BUFFER_BIT) - && ctx->DrawBuffer->Visual.haveAccumBuffer) { - bufferMask |= BUFFER_BIT_ACCUM; - } - - ASSERT(ctx->Driver.Clear); - ctx->Driver.Clear(ctx, bufferMask); - } -} - - - /** * Return bitmask of BUFFER_BIT_* flags indicating which color buffers are * available to the rendering context (for drawing or reading). @@ -273,6 +133,14 @@ draw_buffer_enum_to_bitmask(GLenum buffer) return BUFFER_BIT_COLOR2; case GL_COLOR_ATTACHMENT3_EXT: return BUFFER_BIT_COLOR3; + case GL_COLOR_ATTACHMENT4_EXT: + return BUFFER_BIT_COLOR4; + case GL_COLOR_ATTACHMENT5_EXT: + return BUFFER_BIT_COLOR5; + case GL_COLOR_ATTACHMENT6_EXT: + return BUFFER_BIT_COLOR6; + case GL_COLOR_ATTACHMENT7_EXT: + return BUFFER_BIT_COLOR7; default: /* error */ return BAD_MASK; @@ -322,6 +190,14 @@ read_buffer_enum_to_index(GLenum buffer) return BUFFER_COLOR2; case GL_COLOR_ATTACHMENT3_EXT: return BUFFER_COLOR3; + case GL_COLOR_ATTACHMENT4_EXT: + return BUFFER_COLOR4; + case GL_COLOR_ATTACHMENT5_EXT: + return BUFFER_COLOR5; + case GL_COLOR_ATTACHMENT6_EXT: + return BUFFER_COLOR6; + case GL_COLOR_ATTACHMENT7_EXT: + return BUFFER_COLOR7; default: /* error */ return -1; @@ -336,6 +212,20 @@ read_buffer_enum_to_index(GLenum buffer) * \sa _mesa_DrawBuffersARB * * \param buffer buffer token such as GL_LEFT or GL_FRONT_AND_BACK, etc. + * + * Note that the behaviour of this function depends on whether the + * current ctx->DrawBuffer is a window-system framebuffer (Name=0) or + * a user-created framebuffer object (Name!=0). + * In the former case, we update the per-context ctx->Color.DrawBuffer + * state var _and_ the FB's ColorDrawBuffer state. + * In the later case, we update the FB's ColorDrawBuffer state only. + * + * Furthermore, upon a MakeCurrent() or BindFramebuffer() call, if the + * new FB is a window system FB, we need to re-update the FB's + * ColorDrawBuffer state to match the context. This is handled in + * _mesa_update_framebuffer(). + * + * See the GL_EXT_framebuffer_object spec for more info. */ void GLAPIENTRY _mesa_DrawBuffer(GLenum buffer) @@ -370,6 +260,14 @@ _mesa_DrawBuffer(GLenum buffer) /* if we get here, there's no error so set new state */ _mesa_drawbuffers(ctx, 1, &buffer, &destMask); + + /* + * Call device driver function. + */ + if (ctx->Driver.DrawBuffers) + ctx->Driver.DrawBuffers(ctx, 1, &buffer); + else if (ctx->Driver.DrawBuffer) + ctx->Driver.DrawBuffer(ctx, buffer); } @@ -435,48 +333,28 @@ _mesa_DrawBuffersARB(GLsizei n, const GLenum *buffers) /* OK, if we get here, there were no errors so set the new state */ _mesa_drawbuffers(ctx, n, buffers, destMask); -} - -/** - * Set color output state. Traditionally, there was only one color - * output, but fragment programs can now have several distinct color - * outputs (see GL_ARB_draw_buffers). This function sets the state - * for one such color output. - * \param ctx current context - * \param output which fragment program output - * \param buffer buffer to write to (like GL_LEFT) - * \param destMask BUFFER_* bitmask - * (like BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_BACK_LEFT). - */ -static void -set_color_output(GLcontext *ctx, GLuint output, GLenum buffer, - GLbitfield destMask) -{ - struct gl_framebuffer *fb = ctx->DrawBuffer; - - ASSERT(output < ctx->Const.MaxDrawBuffers); - - /* Set per-FBO state */ - fb->ColorDrawBuffer[output] = buffer; - fb->_ColorDrawBufferMask[output] = destMask; - /* not really needed, will be set later */ - fb->_NumColorDrawBuffers[output] = 0; - - /* Set traditional state var */ - ctx->Color.DrawBuffer[output] = buffer; + /* + * Call device driver function. + */ + if (ctx->Driver.DrawBuffers) + ctx->Driver.DrawBuffers(ctx, n, buffers); + else if (ctx->Driver.DrawBuffer) + ctx->Driver.DrawBuffer(ctx, buffers[0]); } /** - * Helper routine used by _mesa_DrawBuffer, _mesa_DrawBuffersARB and - * _mesa_PopAttrib to set drawbuffer state. + * Helper function to set the GL_DRAW_BUFFER state in the context and + * current FBO. + * * All error checking will have been done prior to calling this function * so nothing should go wrong at this point. + * * \param ctx current context * \param n number of color outputs to set * \param buffers array[n] of colorbuffer names, like GL_LEFT. - * \param destMask array[n] of BUFFER_* bitmasks which correspond to the + * \param destMask array[n] of BUFFER_BIT_* bitmasks which correspond to the * colorbuffer names. (i.e. GL_FRONT_AND_BACK => * BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_BACK_LEFT). */ @@ -484,13 +362,13 @@ void _mesa_drawbuffers(GLcontext *ctx, GLuint n, const GLenum *buffers, const GLbitfield *destMask) { + struct gl_framebuffer *fb = ctx->DrawBuffer; GLbitfield mask[MAX_DRAW_BUFFERS]; - GLuint output; if (!destMask) { /* compute destMask values now */ - const GLbitfield supportedMask - = supported_buffer_bitmask(ctx, ctx->DrawBuffer); + const GLbitfield supportedMask = supported_buffer_bitmask(ctx, fb); + GLuint output; for (output = 0; output < n; output++) { mask[output] = draw_buffer_enum_to_bitmask(buffers[output]); ASSERT(mask[output] != BAD_MASK); @@ -499,24 +377,75 @@ _mesa_drawbuffers(GLcontext *ctx, GLuint n, const GLenum *buffers, destMask = mask; } - for (output = 0; output < n; output++) { - set_color_output(ctx, output, buffers[output], destMask[output]); + if (n == 1) { + GLuint buf, count = 0; + /* init to -1 to help catch errors */ + fb->_ColorDrawBufferIndexes[0] = -1; + for (buf = 0; buf < BUFFER_COUNT; buf++) { + if (destMask[0] & (1 << buf)) { + fb->_ColorDrawBufferIndexes[count] = buf; + count++; + } + } + fb->ColorDrawBuffer[0] = buffers[0]; + fb->_NumColorDrawBuffers = count; + } + else { + GLuint buf, count = 0; + for (buf = 0; buf < n; buf++ ) { + if (destMask[buf]) { + fb->_ColorDrawBufferIndexes[buf] = _mesa_ffs(destMask[buf]) - 1; + fb->ColorDrawBuffer[buf] = buffers[buf]; + count = buf + 1; + } + else { + fb->_ColorDrawBufferIndexes[buf] = -1; + } + } + /* set remaining outputs to -1 (GL_NONE) */ + while (buf < ctx->Const.MaxDrawBuffers) { + fb->_ColorDrawBufferIndexes[buf] = -1; + fb->ColorDrawBuffer[buf] = GL_NONE; + buf++; + } + fb->_NumColorDrawBuffers = count; } - /* set remaining color outputs to NONE */ - for (output = n; output < ctx->Const.MaxDrawBuffers; output++) { - set_color_output(ctx, output, GL_NONE, 0x0); + if (fb->Name == 0) { + /* also set context drawbuffer state */ + GLuint buf; + for (buf = 0; buf < ctx->Const.MaxDrawBuffers; buf++) { + ctx->Color.DrawBuffer[buf] = fb->ColorDrawBuffer[buf]; + } } ctx->NewState |= _NEW_COLOR; +} - /* - * Call device driver function. - */ - if (ctx->Driver.DrawBuffers) - ctx->Driver.DrawBuffers(ctx, n, buffers); - else if (ctx->Driver.DrawBuffer) - ctx->Driver.DrawBuffer(ctx, buffers[0]); + +/** + * Like \sa _mesa_drawbuffers(), this is a helper function for setting + * GL_READ_BUFFER state in the context and current FBO. + * \param ctx the rendering context + * \param buffer GL_FRONT, GL_BACK, GL_COLOR_ATTACHMENT0, etc. + * \param bufferIndex the numerical index corresponding to 'buffer' + */ +void +_mesa_readbuffer(GLcontext *ctx, GLenum buffer, GLint bufferIndex) +{ + struct gl_framebuffer *fb = ctx->ReadBuffer; + + if (fb->Name == 0) { + /* Only update the per-context READ_BUFFER state if we're bound to + * a window-system framebuffer. + */ + ctx->Pixel.ReadBuffer = buffer; + } + + fb->ColorReadBuffer = buffer; + fb->_ColorReadBufferIndex = bufferIndex; + + ctx->NewState |= _NEW_PIXEL; } @@ -534,6 +463,9 @@ _mesa_ReadBuffer(GLenum buffer) GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + if (MESA_VERBOSE & VERBOSE_API) + _mesa_debug(ctx, "glReadBuffer %s\n", _mesa_lookup_enum_by_nr(buffer)); + fb = ctx->ReadBuffer; if (MESA_VERBOSE & VERBOSE_API) @@ -547,23 +479,21 @@ _mesa_ReadBuffer(GLenum buffer) /* general case / window-system framebuffer */ srcBuffer = read_buffer_enum_to_index(buffer); if (srcBuffer == -1) { - _mesa_error(ctx, GL_INVALID_ENUM, "glReadBuffer(buffer=0x%x)", buffer); + _mesa_error(ctx, GL_INVALID_ENUM, + "glReadBuffer(buffer=0x%x)", buffer); return; } supportedMask = supported_buffer_bitmask(ctx, fb); if (((1 << srcBuffer) & supportedMask) == 0) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glReadBuffer(buffer=0x%x)", buffer); + _mesa_error(ctx, GL_INVALID_OPERATION, + "glReadBuffer(buffer=0x%x)", buffer); return; } } - if (fb->Name == 0) { - ctx->Pixel.ReadBuffer = buffer; - } - fb->ColorReadBuffer = buffer; - fb->_ColorReadBufferIndex = srcBuffer; + /* OK, all error checking has been completed now */ - ctx->NewState |= _NEW_PIXEL; + _mesa_readbuffer(ctx, buffer, srcBuffer); /* * Call device driver function. @@ -571,195 +501,3 @@ _mesa_ReadBuffer(GLenum buffer) if (ctx->Driver.ReadBuffer) (*ctx->Driver.ReadBuffer)(ctx, buffer); } - - -#if _HAVE_FULL_GL - -/** - * 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 ); -} - - -/* - * XXX move somewhere else someday? - */ -void GLAPIENTRY -_mesa_SampleCoverageARB(GLclampf value, GLboolean invert) -{ - GET_CURRENT_CONTEXT(ctx); - - if (!ctx->Extensions.ARB_multisample) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glSampleCoverageARB"); - return; - } - - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx ); - ctx->Multisample.SampleCoverageValue = (GLfloat) CLAMP(value, 0.0, 1.0); - ctx->Multisample.SampleCoverageInvert = invert; - ctx->NewState |= _NEW_MULTISAMPLE; -} - -#endif /* _HAVE_FULL_GL */ - - - -/** - * Define the scissor box. - * - * \param x, y coordinates of the scissor box lower-left corner. - * \param width width of the scissor box. - * \param height height of the scissor box. - * - * \sa glScissor(). - * - * Verifies the parameters and updates __GLcontextRec::Scissor. On a - * change flushes the vertices and notifies the driver via - * the dd_function_table::Scissor callback. - */ -void -_mesa_set_scissor(GLcontext *ctx, - GLint x, GLint y, GLsizei width, GLsizei height) -{ - if (x == ctx->Scissor.X && - y == ctx->Scissor.Y && - width == ctx->Scissor.Width && - height == ctx->Scissor.Height) - return; - - FLUSH_VERTICES(ctx, _NEW_SCISSOR); - ctx->Scissor.X = x; - ctx->Scissor.Y = y; - ctx->Scissor.Width = width; - ctx->Scissor.Height = height; - - if (ctx->Driver.Scissor) - ctx->Driver.Scissor( ctx, x, y, width, height ); -} - - -void GLAPIENTRY -_mesa_Scissor( GLint x, GLint y, GLsizei width, GLsizei height ) -{ - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END(ctx); - - if (width < 0 || height < 0) { - _mesa_error( ctx, GL_INVALID_VALUE, "glScissor" ); - return; - } - - if (MESA_VERBOSE & VERBOSE_API) - _mesa_debug(ctx, "glScissor %d %d %d %d\n", x, y, width, height); - - _mesa_set_scissor(ctx, x, y, width, height); -} - - - -/**********************************************************************/ -/** \name Initialization */ -/*@{*/ - -/** - * Initialize the context's scissor state. - * \param ctx the GL context. - */ -void -_mesa_init_scissor(GLcontext *ctx) -{ - /* Scissor group */ - ctx->Scissor.Enabled = GL_FALSE; - ctx->Scissor.X = 0; - ctx->Scissor.Y = 0; - ctx->Scissor.Width = 0; - ctx->Scissor.Height = 0; -} - - -/** - * Initialize the context's multisample state. - * \param ctx the GL context. - */ -void -_mesa_init_multisample(GLcontext *ctx) -{ - ctx->Multisample.Enabled = GL_FALSE; - ctx->Multisample.SampleAlphaToCoverage = GL_FALSE; - ctx->Multisample.SampleAlphaToOne = GL_FALSE; - ctx->Multisample.SampleCoverage = GL_FALSE; - ctx->Multisample.SampleCoverageValue = 1.0; - ctx->Multisample.SampleCoverageInvert = GL_FALSE; -} - -/*@}*/