diff options
Diffstat (limited to 'src/mesa/main/buffers.c')
-rw-r--r-- | src/mesa/main/buffers.c | 149 |
1 files changed, 1 insertions, 148 deletions
diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c index 00f6fb3e64..0c550fd8f1 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. */ @@ -42,153 +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); - - FLUSH_CURRENT(ctx, 0); - - 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 || - ctx->DrawBuffer->_Xmin >= ctx->DrawBuffer->_Xmax || - ctx->DrawBuffer->_Ymin >= ctx->DrawBuffer->_Ymax) - 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) { - GLuint i; - for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) { - bufferMask |= (1 << ctx->DrawBuffer->_ColorDrawBufferIndexes[i]); - } - } - - 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). |