| 0,0 → 1,566 |
|---|
| /* |
| * 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 "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); |
| } |
| } |