From 2039567395da75a3ae318fb82738cdcf2caa05a1 Mon Sep 17 00:00:00 2001 From: marha Date: Wed, 30 Mar 2011 06:43:04 +0000 Subject: mesa git update 30 Mar 2011 --- mesalib/src/mesa/main/clear.c | 1142 +++++++++++++++++++++-------------------- 1 file changed, 575 insertions(+), 567 deletions(-) (limited to 'mesalib/src/mesa/main/clear.c') diff --git a/mesalib/src/mesa/main/clear.c b/mesalib/src/mesa/main/clear.c index ca831476b..fa95e4522 100644 --- a/mesalib/src/mesa/main/clear.c +++ b/mesalib/src/mesa/main/clear.c @@ -1,567 +1,575 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2007 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. - */ - - -/** - * \file clear.c - * glClearColor, glClearIndex, glClear() functions. - */ - - - -#include "glheader.h" -#include "clear.h" -#include "context.h" -#include "colormac.h" -#include "enums.h" -#include "macros.h" -#include "mtypes.h" -#include "state.h" - - - -#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; -} -#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->Driver.ClearColor) { - /* it's OK to call glClearColor in CI mode but it should be a NOP */ - (*ctx->Driver.ClearColor)(ctx, ctx->Color.ClearColor); - } -} - - -/** - * GL_EXT_texture_integer - */ -void GLAPIENTRY -_mesa_ClearColorIiEXT(GLint r, GLint g, GLint b, GLint a) -{ - GLfloat tmp[4]; - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END(ctx); - - tmp[0] = (GLfloat) r; - tmp[1] = (GLfloat) g; - tmp[2] = (GLfloat) b; - tmp[3] = (GLfloat) a; - - if (TEST_EQ_4V(tmp, ctx->Color.ClearColor)) - return; /* no change */ - - FLUSH_VERTICES(ctx, _NEW_COLOR); - - /* XXX we should eventually have a float/int/uint union for - * the ctx->Color.ClearColor state. - */ - COPY_4V(ctx->Color.ClearColor, tmp); - - if (ctx->Driver.ClearColor) { - ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor); - } -} - - -/** - * GL_EXT_texture_integer - */ -void GLAPIENTRY -_mesa_ClearColorIuiEXT(GLuint r, GLuint g, GLuint b, GLuint a) -{ - GLfloat tmp[4]; - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END(ctx); - - tmp[0] = (GLfloat) r; - tmp[1] = (GLfloat) g; - tmp[2] = (GLfloat) b; - tmp[3] = (GLfloat) a; - - if (TEST_EQ_4V(tmp, ctx->Color.ClearColor)) - return; /* no change */ - - FLUSH_VERTICES(ctx, _NEW_COLOR); - - /* XXX we should eventually have a float/int/uint union for - * the ctx->Color.ClearColor state. - */ - COPY_4V(ctx->Color.ClearColor, tmp); - - if (ctx->Driver.ClearColor) { - 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 __struct gl_contextRec::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); - } -} - - -/** Returned by make_color_buffer_mask() for errors */ -#define INVALID_MASK ~0x0 - - -/** - * Convert the glClearBuffer 'drawbuffer' parameter into a bitmask of - * BUFFER_BIT_x values. - * Return INVALID_MASK if the drawbuffer value is invalid. - */ -static GLbitfield -make_color_buffer_mask(struct gl_context *ctx, GLint drawbuffer) -{ - const struct gl_renderbuffer_attachment *att = ctx->DrawBuffer->Attachment; - GLbitfield mask = 0x0; - - switch (drawbuffer) { - case GL_FRONT: - if (att[BUFFER_FRONT_LEFT].Renderbuffer) - mask |= BUFFER_BIT_FRONT_LEFT; - if (att[BUFFER_FRONT_RIGHT].Renderbuffer) - mask |= BUFFER_BIT_FRONT_RIGHT; - break; - case GL_BACK: - if (att[BUFFER_BACK_LEFT].Renderbuffer) - mask |= BUFFER_BIT_BACK_LEFT; - if (att[BUFFER_BACK_RIGHT].Renderbuffer) - mask |= BUFFER_BIT_BACK_RIGHT; - break; - case GL_LEFT: - if (att[BUFFER_FRONT_LEFT].Renderbuffer) - mask |= BUFFER_BIT_FRONT_LEFT; - if (att[BUFFER_BACK_LEFT].Renderbuffer) - mask |= BUFFER_BIT_BACK_LEFT; - break; - case GL_RIGHT: - if (att[BUFFER_FRONT_RIGHT].Renderbuffer) - mask |= BUFFER_BIT_FRONT_RIGHT; - if (att[BUFFER_BACK_RIGHT].Renderbuffer) - mask |= BUFFER_BIT_BACK_RIGHT; - break; - case GL_FRONT_AND_BACK: - if (att[BUFFER_FRONT_LEFT].Renderbuffer) - mask |= BUFFER_BIT_FRONT_LEFT; - if (att[BUFFER_BACK_LEFT].Renderbuffer) - mask |= BUFFER_BIT_BACK_LEFT; - if (att[BUFFER_FRONT_RIGHT].Renderbuffer) - mask |= BUFFER_BIT_FRONT_RIGHT; - if (att[BUFFER_BACK_RIGHT].Renderbuffer) - mask |= BUFFER_BIT_BACK_RIGHT; - break; - default: - if (drawbuffer < 0 || drawbuffer >= (GLint)ctx->Const.MaxDrawBuffers) { - mask = INVALID_MASK; - } - else if (att[BUFFER_COLOR0 + drawbuffer].Renderbuffer) { - mask |= (BUFFER_BIT_COLOR0 << drawbuffer); - } - } - - return mask; -} - - - -/** - * New in GL 3.0 - * Clear signed integer color buffer or stencil buffer (not depth). - */ -void GLAPIENTRY -_mesa_ClearBufferiv(GLenum buffer, GLint drawbuffer, const GLint *value) -{ - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); - - FLUSH_CURRENT(ctx, 0); - - if (ctx->NewState) { - _mesa_update_state( ctx ); - } - - switch (buffer) { - case GL_STENCIL: - if (drawbuffer != 0) { - _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferiv(drawbuffer=%d)", - drawbuffer); - return; - } - else { - /* Save current stencil clear value, set to 'value', do the - * stencil clear and restore the clear value. - * XXX in the future we may have a new ctx->Driver.ClearBuffer() - * hook instead. - */ - const GLuint clearSave = ctx->Stencil.Clear; - ctx->Stencil.Clear = *value; - if (ctx->Driver.ClearStencil) - ctx->Driver.ClearStencil(ctx, *value); - ctx->Driver.Clear(ctx, BUFFER_BIT_STENCIL); - ctx->Stencil.Clear = clearSave; - if (ctx->Driver.ClearStencil) - ctx->Driver.ClearStencil(ctx, clearSave); - } - break; - case GL_COLOR: - { - const GLbitfield mask = make_color_buffer_mask(ctx, drawbuffer); - if (mask == INVALID_MASK) { - _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferiv(drawbuffer=%d)", - drawbuffer); - return; - } - else if (mask) { - /* XXX note: we're putting the integer clear values into the - * floating point state var. This will not always work. We'll - * need a new ctx->Driver.ClearBuffer() hook.... - */ - GLclampf clearSave[4]; - /* save color */ - COPY_4V(clearSave, ctx->Color.ClearColor); - /* set color */ - COPY_4V_CAST(ctx->Color.ClearColor, value, GLclampf); - if (ctx->Driver.ClearColor) - ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor); - /* clear buffer(s) */ - ctx->Driver.Clear(ctx, mask); - /* restore color */ - COPY_4V(ctx->Color.ClearColor, clearSave); - if (ctx->Driver.ClearColor) - ctx->Driver.ClearColor(ctx, clearSave); - } - } - break; - default: - _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferiv(buffer=%s)", - _mesa_lookup_enum_by_nr(buffer)); - return; - } -} - - -/** - * New in GL 3.0 - * Clear unsigned integer color buffer (not depth, not stencil). - */ -void GLAPIENTRY -_mesa_ClearBufferuiv(GLenum buffer, GLint drawbuffer, const GLuint *value) -{ - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); - - FLUSH_CURRENT(ctx, 0); - - if (ctx->NewState) { - _mesa_update_state( ctx ); - } - - switch (buffer) { - case GL_COLOR: - { - const GLbitfield mask = make_color_buffer_mask(ctx, drawbuffer); - if (mask == INVALID_MASK) { - _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferuiv(drawbuffer=%d)", - drawbuffer); - return; - } - else if (mask) { - /* XXX note: we're putting the uint clear values into the - * floating point state var. This will not always work. We'll - * need a new ctx->Driver.ClearBuffer() hook.... - */ - GLclampf clearSave[4]; - /* save color */ - COPY_4V(clearSave, ctx->Color.ClearColor); - /* set color */ - COPY_4V_CAST(ctx->Color.ClearColor, value, GLclampf); - if (ctx->Driver.ClearColor) - ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor); - /* clear buffer(s) */ - ctx->Driver.Clear(ctx, mask); - /* restore color */ - COPY_4V(ctx->Color.ClearColor, clearSave); - if (ctx->Driver.ClearColor) - ctx->Driver.ClearColor(ctx, clearSave); - } - } - break; - default: - _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferuiv(buffer=%s)", - _mesa_lookup_enum_by_nr(buffer)); - return; - } -} - - -/** - * New in GL 3.0 - * Clear fixed-pt or float color buffer or depth buffer (not stencil). - */ -void GLAPIENTRY -_mesa_ClearBufferfv(GLenum buffer, GLint drawbuffer, const GLfloat *value) -{ - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); - - FLUSH_CURRENT(ctx, 0); - - if (ctx->NewState) { - _mesa_update_state( ctx ); - } - - switch (buffer) { - case GL_DEPTH: - if (drawbuffer != 0) { - _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferfv(drawbuffer=%d)", - drawbuffer); - return; - } - else { - /* Save current depth clear value, set to 'value', do the - * depth clear and restore the clear value. - * XXX in the future we may have a new ctx->Driver.ClearBuffer() - * hook instead. - */ - const GLclampd clearSave = ctx->Depth.Clear; - ctx->Depth.Clear = *value; - if (ctx->Driver.ClearDepth) - ctx->Driver.ClearDepth(ctx, *value); - ctx->Driver.Clear(ctx, BUFFER_BIT_DEPTH); - ctx->Depth.Clear = clearSave; - if (ctx->Driver.ClearDepth) - ctx->Driver.ClearDepth(ctx, clearSave); - } - /* clear depth buffer to value */ - break; - case GL_COLOR: - { - const GLbitfield mask = make_color_buffer_mask(ctx, drawbuffer); - if (mask == INVALID_MASK) { - _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferfv(drawbuffer=%d)", - drawbuffer); - return; - } - else if (mask) { - GLclampf clearSave[4]; - /* save color */ - COPY_4V(clearSave, ctx->Color.ClearColor); - /* set color */ - COPY_4V_CAST(ctx->Color.ClearColor, value, GLclampf); - if (ctx->Driver.ClearColor) - ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor); - /* clear buffer(s) */ - ctx->Driver.Clear(ctx, mask); - /* restore color */ - COPY_4V(ctx->Color.ClearColor, clearSave); - if (ctx->Driver.ClearColor) - ctx->Driver.ClearColor(ctx, clearSave); - } - } - break; - default: - _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferfv(buffer=%s)", - _mesa_lookup_enum_by_nr(buffer)); - return; - } -} - - -/** - * New in GL 3.0 - * Clear depth/stencil buffer only. - */ -void GLAPIENTRY -_mesa_ClearBufferfi(GLenum buffer, GLint drawbuffer, - GLfloat depth, GLint stencil) -{ - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); - - FLUSH_CURRENT(ctx, 0); - - if (buffer != GL_DEPTH_STENCIL) { - _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferfi(buffer=%s)", - _mesa_lookup_enum_by_nr(buffer)); - return; - } - - if (drawbuffer != 0) { - _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferfi(drawbuffer=%d)", - drawbuffer); - return; - } - - if (ctx->NewState) { - _mesa_update_state( ctx ); - } - - { - /* save current clear values */ - const GLclampd clearDepthSave = ctx->Depth.Clear; - const GLuint clearStencilSave = ctx->Stencil.Clear; - - /* set new clear values */ - ctx->Depth.Clear = depth; - ctx->Stencil.Clear = stencil; - if (ctx->Driver.ClearDepth) - ctx->Driver.ClearDepth(ctx, depth); - if (ctx->Driver.ClearStencil) - ctx->Driver.ClearStencil(ctx, stencil); - - /* clear buffers */ - ctx->Driver.Clear(ctx, BUFFER_BIT_DEPTH | BUFFER_BIT_STENCIL); - - /* restore */ - ctx->Depth.Clear = clearDepthSave; - ctx->Stencil.Clear = clearStencilSave; - if (ctx->Driver.ClearDepth) - ctx->Driver.ClearDepth(ctx, clearDepthSave); - if (ctx->Driver.ClearStencil) - ctx->Driver.ClearStencil(ctx, clearStencilSave); - } -} +/* + * Mesa 3-D graphics library + * Version: 7.1 + * + * Copyright (C) 1999-2007 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. + */ + + +/** + * \file clear.c + * glClearColor, glClearIndex, glClear() functions. + */ + + + +#include "glheader.h" +#include "clear.h" +#include "context.h" +#include "colormac.h" +#include "enums.h" +#include "macros.h" +#include "mtypes.h" +#include "state.h" + + + +#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; +} +#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] = red; + tmp[1] = green; + tmp[2] = blue; + tmp[3] = alpha; + + if (TEST_EQ_4V(tmp, ctx->Color.ClearColorUnclamped)) + return; /* no change */ + + FLUSH_VERTICES(ctx, _NEW_COLOR); + COPY_4V(ctx->Color.ClearColorUnclamped, tmp); + + ctx->Color.ClearColor[0] = CLAMP(tmp[0], 0.0F, 1.0F); + ctx->Color.ClearColor[1] = CLAMP(tmp[1], 0.0F, 1.0F); + ctx->Color.ClearColor[2] = CLAMP(tmp[2], 0.0F, 1.0F); + ctx->Color.ClearColor[3] = CLAMP(tmp[3], 0.0F, 1.0F); + + if (ctx->Driver.ClearColor) { + /* it's OK to call glClearColor in CI mode but it should be a NOP */ + /* we pass the clamped color, since all drivers that need this don't + * support GL_ARB_color_buffer_float + */ + (*ctx->Driver.ClearColor)(ctx, ctx->Color.ClearColor); + } +} + + +/** + * GL_EXT_texture_integer + */ +void GLAPIENTRY +_mesa_ClearColorIiEXT(GLint r, GLint g, GLint b, GLint a) +{ + GLfloat tmp[4]; + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); + + tmp[0] = (GLfloat) r; + tmp[1] = (GLfloat) g; + tmp[2] = (GLfloat) b; + tmp[3] = (GLfloat) a; + + if (TEST_EQ_4V(tmp, ctx->Color.ClearColor)) + return; /* no change */ + + FLUSH_VERTICES(ctx, _NEW_COLOR); + + /* XXX we should eventually have a float/int/uint union for + * the ctx->Color.ClearColor state. + */ + COPY_4V(ctx->Color.ClearColor, tmp); + + if (ctx->Driver.ClearColor) { + ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor); + } +} + + +/** + * GL_EXT_texture_integer + */ +void GLAPIENTRY +_mesa_ClearColorIuiEXT(GLuint r, GLuint g, GLuint b, GLuint a) +{ + GLfloat tmp[4]; + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); + + tmp[0] = (GLfloat) r; + tmp[1] = (GLfloat) g; + tmp[2] = (GLfloat) b; + tmp[3] = (GLfloat) a; + + if (TEST_EQ_4V(tmp, ctx->Color.ClearColor)) + return; /* no change */ + + FLUSH_VERTICES(ctx, _NEW_COLOR); + + /* XXX we should eventually have a float/int/uint union for + * the ctx->Color.ClearColor state. + */ + COPY_4V(ctx->Color.ClearColor, tmp); + + if (ctx->Driver.ClearColor) { + 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 __struct gl_contextRec::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); + } +} + + +/** Returned by make_color_buffer_mask() for errors */ +#define INVALID_MASK ~0x0 + + +/** + * Convert the glClearBuffer 'drawbuffer' parameter into a bitmask of + * BUFFER_BIT_x values. + * Return INVALID_MASK if the drawbuffer value is invalid. + */ +static GLbitfield +make_color_buffer_mask(struct gl_context *ctx, GLint drawbuffer) +{ + const struct gl_renderbuffer_attachment *att = ctx->DrawBuffer->Attachment; + GLbitfield mask = 0x0; + + switch (drawbuffer) { + case GL_FRONT: + if (att[BUFFER_FRONT_LEFT].Renderbuffer) + mask |= BUFFER_BIT_FRONT_LEFT; + if (att[BUFFER_FRONT_RIGHT].Renderbuffer) + mask |= BUFFER_BIT_FRONT_RIGHT; + break; + case GL_BACK: + if (att[BUFFER_BACK_LEFT].Renderbuffer) + mask |= BUFFER_BIT_BACK_LEFT; + if (att[BUFFER_BACK_RIGHT].Renderbuffer) + mask |= BUFFER_BIT_BACK_RIGHT; + break; + case GL_LEFT: + if (att[BUFFER_FRONT_LEFT].Renderbuffer) + mask |= BUFFER_BIT_FRONT_LEFT; + if (att[BUFFER_BACK_LEFT].Renderbuffer) + mask |= BUFFER_BIT_BACK_LEFT; + break; + case GL_RIGHT: + if (att[BUFFER_FRONT_RIGHT].Renderbuffer) + mask |= BUFFER_BIT_FRONT_RIGHT; + if (att[BUFFER_BACK_RIGHT].Renderbuffer) + mask |= BUFFER_BIT_BACK_RIGHT; + break; + case GL_FRONT_AND_BACK: + if (att[BUFFER_FRONT_LEFT].Renderbuffer) + mask |= BUFFER_BIT_FRONT_LEFT; + if (att[BUFFER_BACK_LEFT].Renderbuffer) + mask |= BUFFER_BIT_BACK_LEFT; + if (att[BUFFER_FRONT_RIGHT].Renderbuffer) + mask |= BUFFER_BIT_FRONT_RIGHT; + if (att[BUFFER_BACK_RIGHT].Renderbuffer) + mask |= BUFFER_BIT_BACK_RIGHT; + break; + default: + if (drawbuffer < 0 || drawbuffer >= (GLint)ctx->Const.MaxDrawBuffers) { + mask = INVALID_MASK; + } + else if (att[BUFFER_COLOR0 + drawbuffer].Renderbuffer) { + mask |= (BUFFER_BIT_COLOR0 << drawbuffer); + } + } + + return mask; +} + + + +/** + * New in GL 3.0 + * Clear signed integer color buffer or stencil buffer (not depth). + */ +void GLAPIENTRY +_mesa_ClearBufferiv(GLenum buffer, GLint drawbuffer, const GLint *value) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + + FLUSH_CURRENT(ctx, 0); + + if (ctx->NewState) { + _mesa_update_state( ctx ); + } + + switch (buffer) { + case GL_STENCIL: + if (drawbuffer != 0) { + _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferiv(drawbuffer=%d)", + drawbuffer); + return; + } + else { + /* Save current stencil clear value, set to 'value', do the + * stencil clear and restore the clear value. + * XXX in the future we may have a new ctx->Driver.ClearBuffer() + * hook instead. + */ + const GLuint clearSave = ctx->Stencil.Clear; + ctx->Stencil.Clear = *value; + if (ctx->Driver.ClearStencil) + ctx->Driver.ClearStencil(ctx, *value); + ctx->Driver.Clear(ctx, BUFFER_BIT_STENCIL); + ctx->Stencil.Clear = clearSave; + if (ctx->Driver.ClearStencil) + ctx->Driver.ClearStencil(ctx, clearSave); + } + break; + case GL_COLOR: + { + const GLbitfield mask = make_color_buffer_mask(ctx, drawbuffer); + if (mask == INVALID_MASK) { + _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferiv(drawbuffer=%d)", + drawbuffer); + return; + } + else if (mask) { + /* XXX note: we're putting the integer clear values into the + * floating point state var. This will not always work. We'll + * need a new ctx->Driver.ClearBuffer() hook.... + */ + GLclampf clearSave[4]; + /* save color */ + COPY_4V(clearSave, ctx->Color.ClearColor); + /* set color */ + COPY_4V_CAST(ctx->Color.ClearColor, value, GLclampf); + if (ctx->Driver.ClearColor) + ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor); + /* clear buffer(s) */ + ctx->Driver.Clear(ctx, mask); + /* restore color */ + COPY_4V(ctx->Color.ClearColor, clearSave); + if (ctx->Driver.ClearColor) + ctx->Driver.ClearColor(ctx, clearSave); + } + } + break; + default: + _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferiv(buffer=%s)", + _mesa_lookup_enum_by_nr(buffer)); + return; + } +} + + +/** + * New in GL 3.0 + * Clear unsigned integer color buffer (not depth, not stencil). + */ +void GLAPIENTRY +_mesa_ClearBufferuiv(GLenum buffer, GLint drawbuffer, const GLuint *value) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + + FLUSH_CURRENT(ctx, 0); + + if (ctx->NewState) { + _mesa_update_state( ctx ); + } + + switch (buffer) { + case GL_COLOR: + { + const GLbitfield mask = make_color_buffer_mask(ctx, drawbuffer); + if (mask == INVALID_MASK) { + _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferuiv(drawbuffer=%d)", + drawbuffer); + return; + } + else if (mask) { + /* XXX note: we're putting the uint clear values into the + * floating point state var. This will not always work. We'll + * need a new ctx->Driver.ClearBuffer() hook.... + */ + GLclampf clearSave[4]; + /* save color */ + COPY_4V(clearSave, ctx->Color.ClearColor); + /* set color */ + COPY_4V_CAST(ctx->Color.ClearColor, value, GLclampf); + if (ctx->Driver.ClearColor) + ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor); + /* clear buffer(s) */ + ctx->Driver.Clear(ctx, mask); + /* restore color */ + COPY_4V(ctx->Color.ClearColor, clearSave); + if (ctx->Driver.ClearColor) + ctx->Driver.ClearColor(ctx, clearSave); + } + } + break; + default: + _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferuiv(buffer=%s)", + _mesa_lookup_enum_by_nr(buffer)); + return; + } +} + + +/** + * New in GL 3.0 + * Clear fixed-pt or float color buffer or depth buffer (not stencil). + */ +void GLAPIENTRY +_mesa_ClearBufferfv(GLenum buffer, GLint drawbuffer, const GLfloat *value) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + + FLUSH_CURRENT(ctx, 0); + + if (ctx->NewState) { + _mesa_update_state( ctx ); + } + + switch (buffer) { + case GL_DEPTH: + if (drawbuffer != 0) { + _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferfv(drawbuffer=%d)", + drawbuffer); + return; + } + else { + /* Save current depth clear value, set to 'value', do the + * depth clear and restore the clear value. + * XXX in the future we may have a new ctx->Driver.ClearBuffer() + * hook instead. + */ + const GLclampd clearSave = ctx->Depth.Clear; + ctx->Depth.Clear = *value; + if (ctx->Driver.ClearDepth) + ctx->Driver.ClearDepth(ctx, *value); + ctx->Driver.Clear(ctx, BUFFER_BIT_DEPTH); + ctx->Depth.Clear = clearSave; + if (ctx->Driver.ClearDepth) + ctx->Driver.ClearDepth(ctx, clearSave); + } + /* clear depth buffer to value */ + break; + case GL_COLOR: + { + const GLbitfield mask = make_color_buffer_mask(ctx, drawbuffer); + if (mask == INVALID_MASK) { + _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferfv(drawbuffer=%d)", + drawbuffer); + return; + } + else if (mask) { + GLclampf clearSave[4]; + /* save color */ + COPY_4V(clearSave, ctx->Color.ClearColor); + /* set color */ + COPY_4V_CAST(ctx->Color.ClearColor, value, GLclampf); + if (ctx->Driver.ClearColor) + ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor); + /* clear buffer(s) */ + ctx->Driver.Clear(ctx, mask); + /* restore color */ + COPY_4V(ctx->Color.ClearColor, clearSave); + if (ctx->Driver.ClearColor) + ctx->Driver.ClearColor(ctx, clearSave); + } + } + break; + default: + _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferfv(buffer=%s)", + _mesa_lookup_enum_by_nr(buffer)); + return; + } +} + + +/** + * New in GL 3.0 + * Clear depth/stencil buffer only. + */ +void GLAPIENTRY +_mesa_ClearBufferfi(GLenum buffer, GLint drawbuffer, + GLfloat depth, GLint stencil) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + + FLUSH_CURRENT(ctx, 0); + + if (buffer != GL_DEPTH_STENCIL) { + _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferfi(buffer=%s)", + _mesa_lookup_enum_by_nr(buffer)); + return; + } + + if (drawbuffer != 0) { + _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferfi(drawbuffer=%d)", + drawbuffer); + return; + } + + if (ctx->NewState) { + _mesa_update_state( ctx ); + } + + { + /* save current clear values */ + const GLclampd clearDepthSave = ctx->Depth.Clear; + const GLuint clearStencilSave = ctx->Stencil.Clear; + + /* set new clear values */ + ctx->Depth.Clear = depth; + ctx->Stencil.Clear = stencil; + if (ctx->Driver.ClearDepth) + ctx->Driver.ClearDepth(ctx, depth); + if (ctx->Driver.ClearStencil) + ctx->Driver.ClearStencil(ctx, stencil); + + /* clear buffers */ + ctx->Driver.Clear(ctx, BUFFER_BIT_DEPTH | BUFFER_BIT_STENCIL); + + /* restore */ + ctx->Depth.Clear = clearDepthSave; + ctx->Stencil.Clear = clearStencilSave; + if (ctx->Driver.ClearDepth) + ctx->Driver.ClearDepth(ctx, clearDepthSave); + if (ctx->Driver.ClearStencil) + ctx->Driver.ClearStencil(ctx, clearStencilSave); + } +} -- cgit v1.2.3