diff options
Diffstat (limited to 'mesalib/src/mesa/main/clear.c')
| -rw-r--r-- | mesalib/src/mesa/main/clear.c | 1150 |
1 files changed, 575 insertions, 575 deletions
diff --git a/mesalib/src/mesa/main/clear.c b/mesalib/src/mesa/main/clear.c index 449a8d6ec..fa95e4522 100644 --- a/mesalib/src/mesa/main/clear.c +++ b/mesalib/src/mesa/main/clear.c @@ -1,575 +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] = 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);
- }
-}
+/* + * 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); + } +} |