| /* |
| * Mesa 3-D graphics library |
| * |
| * 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 |
| * THE AUTHORS OR COPYRIGHT HOLDERS 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 "glformats.h" |
| #include "glheader.h" |
| #include "clear.h" |
| #include "context.h" |
| #include "enums.h" |
| #include "fbobject.h" |
| #include "get.h" |
| #include "macros.h" |
| #include "mtypes.h" |
| #include "state.h" |
| |
| |
| |
| void GLAPIENTRY |
| _mesa_ClearIndex( GLfloat c ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| |
| ctx->Color.ClearIndex = (GLuint) c; |
| } |
| |
| |
| /** |
| * 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(). |
| */ |
| void GLAPIENTRY |
| _mesa_ClearColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| |
| ctx->Color.ClearColor.f[0] = red; |
| ctx->Color.ClearColor.f[1] = green; |
| ctx->Color.ClearColor.f[2] = blue; |
| ctx->Color.ClearColor.f[3] = alpha; |
| } |
| |
| |
| /** |
| * GL_EXT_texture_integer |
| */ |
| void GLAPIENTRY |
| _mesa_ClearColorIiEXT(GLint r, GLint g, GLint b, GLint a) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| |
| ctx->Color.ClearColor.i[0] = r; |
| ctx->Color.ClearColor.i[1] = g; |
| ctx->Color.ClearColor.i[2] = b; |
| ctx->Color.ClearColor.i[3] = a; |
| } |
| |
| |
| /** |
| * GL_EXT_texture_integer |
| */ |
| void GLAPIENTRY |
| _mesa_ClearColorIuiEXT(GLuint r, GLuint g, GLuint b, GLuint a) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| |
| ctx->Color.ClearColor.ui[0] = r; |
| ctx->Color.ClearColor.ui[1] = g; |
| ctx->Color.ClearColor.ui[2] = b; |
| ctx->Color.ClearColor.ui[3] = a; |
| } |
| |
| |
| /** |
| * Returns true if color writes are enabled for the given color attachment. |
| * |
| * Beyond checking ColorMask, this uses _mesa_format_has_color_component to |
| * ignore components that don't actually exist in the format (such as X in |
| * XRGB). |
| */ |
| static bool |
| color_buffer_writes_enabled(const struct gl_context *ctx, unsigned idx) |
| { |
| struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[idx]; |
| GLuint c; |
| |
| if (rb) { |
| for (c = 0; c < 4; c++) { |
| if (GET_COLORMASK_BIT(ctx->Color.ColorMask, idx, c) && |
| _mesa_format_has_color_component(rb->Format, c)) { |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| |
| /** |
| * 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. |
| */ |
| static ALWAYS_INLINE void |
| clear(struct gl_context *ctx, GLbitfield mask, bool no_error) |
| { |
| FLUSH_VERTICES(ctx, 0); |
| |
| if (!no_error) { |
| if (mask & ~(GL_COLOR_BUFFER_BIT | |
| GL_DEPTH_BUFFER_BIT | |
| GL_STENCIL_BUFFER_BIT | |
| GL_ACCUM_BUFFER_BIT)) { |
| _mesa_error( ctx, GL_INVALID_VALUE, "glClear(0x%x)", mask); |
| return; |
| } |
| |
| /* Accumulation buffers were removed in core contexts, and they never |
| * existed in OpenGL ES. |
| */ |
| if ((mask & GL_ACCUM_BUFFER_BIT) != 0 |
| && (ctx->API == API_OPENGL_CORE || _mesa_is_gles(ctx))) { |
| _mesa_error( ctx, GL_INVALID_VALUE, "glClear(GL_ACCUM_BUFFER_BIT)"); |
| return; |
| } |
| } |
| |
| if (ctx->NewState) { |
| _mesa_update_state( ctx ); /* update _Xmin, etc */ |
| } |
| |
| if (!no_error && ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { |
| _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, |
| "glClear(incomplete framebuffer)"); |
| return; |
| } |
| |
| if (ctx->RasterDiscard) |
| 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++) { |
| gl_buffer_index buf = ctx->DrawBuffer->_ColorDrawBufferIndexes[i]; |
| |
| if (buf != BUFFER_NONE && color_buffer_writes_enabled(ctx, i)) { |
| bufferMask |= 1 << buf; |
| } |
| } |
| } |
| |
| if ((mask & GL_DEPTH_BUFFER_BIT) |
| && ctx->DrawBuffer->Visual.depthBits > 0) { |
| bufferMask |= BUFFER_BIT_DEPTH; |
| } |
| |
| if ((mask & GL_STENCIL_BUFFER_BIT) |
| && ctx->DrawBuffer->Visual.stencilBits > 0) { |
| bufferMask |= BUFFER_BIT_STENCIL; |
| } |
| |
| if ((mask & GL_ACCUM_BUFFER_BIT) |
| && ctx->DrawBuffer->Visual.accumRedBits > 0) { |
| bufferMask |= BUFFER_BIT_ACCUM; |
| } |
| |
| assert(ctx->Driver.Clear); |
| ctx->Driver.Clear(ctx, bufferMask); |
| } |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_Clear_no_error(GLbitfield mask) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| clear(ctx, mask, true); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_Clear(GLbitfield mask) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| |
| if (MESA_VERBOSE & VERBOSE_API) |
| _mesa_debug(ctx, "glClear 0x%x\n", mask); |
| |
| clear(ctx, mask, false); |
| } |
| |
| |
| /** Returned by make_color_buffer_mask() for errors */ |
| #define INVALID_MASK ~0x0U |
| |
| |
| /** |
| * 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; |
| |
| /* From the GL 4.0 specification: |
| * If buffer is COLOR, a particular draw buffer DRAW_BUFFERi is |
| * specified by passing i as the parameter drawbuffer, and value |
| * points to a four-element vector specifying the R, G, B, and A |
| * color to clear that draw buffer to. If the draw buffer is one |
| * of FRONT, BACK, LEFT, RIGHT, or FRONT_AND_BACK, identifying |
| * multiple buffers, each selected buffer is cleared to the same |
| * value. |
| * |
| * Note that "drawbuffer" and "draw buffer" have different meaning. |
| * "drawbuffer" specifies DRAW_BUFFERi, while "draw buffer" is what's |
| * assigned to DRAW_BUFFERi. It could be COLOR_ATTACHMENT0, FRONT, BACK, |
| * etc. |
| */ |
| if (drawbuffer < 0 || drawbuffer >= (GLint)ctx->Const.MaxDrawBuffers) { |
| return INVALID_MASK; |
| } |
| |
| switch (ctx->DrawBuffer->ColorDrawBuffer[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: |
| /* For GLES contexts with a single buffered configuration, we actually |
| * only have a front renderbuffer, so any clear calls to GL_BACK should |
| * affect that buffer. See draw_buffer_enum_to_bitmask for details. |
| */ |
| if (_mesa_is_gles(ctx)) |
| if (!ctx->DrawBuffer->Visual.doubleBufferMode) |
| 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_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: |
| { |
| gl_buffer_index buf = |
| ctx->DrawBuffer->_ColorDrawBufferIndexes[drawbuffer]; |
| |
| if (buf != BUFFER_NONE && att[buf].Renderbuffer) { |
| mask |= 1 << buf; |
| } |
| } |
| } |
| |
| return mask; |
| } |
| |
| |
| |
| /** |
| * New in GL 3.0 |
| * Clear signed integer color buffer or stencil buffer (not depth). |
| */ |
| static ALWAYS_INLINE void |
| clear_bufferiv(struct gl_context *ctx, GLenum buffer, GLint drawbuffer, |
| const GLint *value, bool no_error) |
| { |
| FLUSH_VERTICES(ctx, 0); |
| |
| if (ctx->NewState) { |
| _mesa_update_state( ctx ); |
| } |
| |
| if (!no_error && ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { |
| _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, |
| "glClearBufferiv(incomplete framebuffer)"); |
| return; |
| } |
| |
| switch (buffer) { |
| case GL_STENCIL: |
| /* Page 264 (page 280 of the PDF) of the OpenGL 3.0 spec says: |
| * |
| * "ClearBuffer generates an INVALID VALUE error if buffer is |
| * COLOR and drawbuffer is less than zero, or greater than the |
| * value of MAX DRAW BUFFERS minus one; or if buffer is DEPTH, |
| * STENCIL, or DEPTH STENCIL and drawbuffer is not zero." |
| */ |
| if (!no_error && drawbuffer != 0) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferiv(drawbuffer=%d)", |
| drawbuffer); |
| return; |
| } |
| else if (ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Renderbuffer |
| && !ctx->RasterDiscard) { |
| /* 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; |
| ctx->Driver.Clear(ctx, BUFFER_BIT_STENCIL); |
| ctx->Stencil.Clear = clearSave; |
| } |
| break; |
| case GL_COLOR: |
| { |
| const GLbitfield mask = make_color_buffer_mask(ctx, drawbuffer); |
| if (!no_error && mask == INVALID_MASK) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferiv(drawbuffer=%d)", |
| drawbuffer); |
| return; |
| } |
| else if (mask && !ctx->RasterDiscard) { |
| union gl_color_union clearSave; |
| |
| /* save color */ |
| clearSave = ctx->Color.ClearColor; |
| /* set color */ |
| COPY_4V(ctx->Color.ClearColor.i, value); |
| /* clear buffer(s) */ |
| ctx->Driver.Clear(ctx, mask); |
| /* restore color */ |
| ctx->Color.ClearColor = clearSave; |
| } |
| } |
| break; |
| default: |
| if (!no_error) { |
| /* Page 498 of the PDF, section '17.4.3.1 Clearing Individual Buffers' |
| * of the OpenGL 4.5 spec states: |
| * |
| * "An INVALID_ENUM error is generated by ClearBufferiv and |
| * ClearNamedFramebufferiv if buffer is not COLOR or STENCIL." |
| */ |
| _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferiv(buffer=%s)", |
| _mesa_enum_to_string(buffer)); |
| } |
| return; |
| } |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_ClearBufferiv_no_error(GLenum buffer, GLint drawbuffer, const GLint *value) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| clear_bufferiv(ctx, buffer, drawbuffer, value, true); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_ClearBufferiv(GLenum buffer, GLint drawbuffer, const GLint *value) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| clear_bufferiv(ctx, buffer, drawbuffer, value, false); |
| } |
| |
| |
| /** |
| * The ClearBuffer framework is so complicated and so riddled with the |
| * assumption that the framebuffer is bound that, for now, we will just fake |
| * direct state access clearing for the user. |
| */ |
| void GLAPIENTRY |
| _mesa_ClearNamedFramebufferiv(GLuint framebuffer, GLenum buffer, |
| GLint drawbuffer, const GLint *value) |
| { |
| GLint oldfb; |
| |
| _mesa_GetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &oldfb); |
| _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer); |
| _mesa_ClearBufferiv(buffer, drawbuffer, value); |
| _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, (GLuint) oldfb); |
| } |
| |
| |
| /** |
| * New in GL 3.0 |
| * Clear unsigned integer color buffer (not depth, not stencil). |
| */ |
| static ALWAYS_INLINE void |
| clear_bufferuiv(struct gl_context *ctx, GLenum buffer, GLint drawbuffer, |
| const GLuint *value, bool no_error) |
| { |
| FLUSH_VERTICES(ctx, 0); |
| |
| if (ctx->NewState) { |
| _mesa_update_state( ctx ); |
| } |
| |
| if (!no_error && ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE) { |
| _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION, |
| "glClearBufferuiv(incomplete framebuffer)"); |
| return; |
| } |
| |
| switch (buffer) { |
| case GL_COLOR: |
| { |
| const GLbitfield mask = make_color_buffer_mask(ctx, drawbuffer); |
| if (!no_error && mask == INVALID_MASK) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferuiv(drawbuffer=%d)", |
| drawbuffer); |
| return; |
| } |
| else if (mask && !ctx->RasterDiscard) { |
| union gl_color_union clearSave; |
| |
| /* save color */ |
| clearSave = ctx->Color.ClearColor; |
| /* set color */ |
| COPY_4V(ctx->Color.ClearColor.ui, value); |
| /* clear buffer(s) */ |
| ctx->Driver.Clear(ctx, mask); |
| /* restore color */ |
| ctx->Color.ClearColor = clearSave; |
| } |
| } |
| break; |
| default: |
| if (!no_error) { |
| /* Page 498 of the PDF, section '17.4.3.1 Clearing Individual Buffers' |
| * of the OpenGL 4.5 spec states: |
| * |
| * "An INVALID_ENUM error is generated by ClearBufferuiv and |
| * ClearNamedFramebufferuiv if buffer is not COLOR." |
| */ |
| _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferuiv(buffer=%s)", |
| _mesa_enum_to_string(buffer)); |
| } |
| return; |
| } |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_ClearBufferuiv_no_error(GLenum buffer, GLint drawbuffer, |
| const GLuint *value) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| clear_bufferuiv(ctx, buffer, drawbuffer, value, true); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_ClearBufferuiv(GLenum buffer, GLint drawbuffer, const GLuint *value) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| clear_bufferuiv(ctx, buffer, drawbuffer, value, false); |
| } |
| |
| |
| /** |
| * The ClearBuffer framework is so complicated and so riddled with the |
| * assumption that the framebuffer is bound that, for now, we will just fake |
| * direct state access clearing for the user. |
| */ |
| void GLAPIENTRY |
| _mesa_ClearNamedFramebufferuiv(GLuint framebuffer, GLenum buffer, |
| GLint drawbuffer, const GLuint *value) |
| { |
| GLint oldfb; |
| |
| _mesa_GetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &oldfb); |
| _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer); |
| _mesa_ClearBufferuiv(buffer, drawbuffer, value); |
| _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, (GLuint) oldfb); |
| } |
| |
| |
| /** |
| * New in GL 3.0 |
| * Clear fixed-pt or float color buffer or depth buffer (not stencil). |
| */ |
| static ALWAYS_INLINE void |
| clear_bufferfv(struct gl_context *ctx, GLenum buffer, GLint drawbuffer, |
| const GLfloat *value, bool no_error) |
| { |
| FLUSH_VERTICES(ctx, 0); |
| |
| if (ctx->NewState) { |
| _mesa_update_state( ctx ); |
| } |
| |
| if (!no_error && ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE) { |
| _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION, |
| "glClearBufferfv(incomplete framebuffer)"); |
| return; |
| } |
| |
| switch (buffer) { |
| case GL_DEPTH: |
| /* Page 264 (page 280 of the PDF) of the OpenGL 3.0 spec says: |
| * |
| * "ClearBuffer generates an INVALID VALUE error if buffer is |
| * COLOR and drawbuffer is less than zero, or greater than the |
| * value of MAX DRAW BUFFERS minus one; or if buffer is DEPTH, |
| * STENCIL, or DEPTH STENCIL and drawbuffer is not zero." |
| */ |
| if (!no_error && drawbuffer != 0) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferfv(drawbuffer=%d)", |
| drawbuffer); |
| return; |
| } |
| else if (ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer |
| && !ctx->RasterDiscard) { |
| /* 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; |
| |
| /* Page 263 (page 279 of the PDF) of the OpenGL 3.0 spec says: |
| * |
| * "If buffer is DEPTH, drawbuffer must be zero, and value points |
| * to the single depth value to clear the depth buffer to. |
| * Clamping and type conversion for fixed-point depth buffers are |
| * performed in the same fashion as for ClearDepth." |
| */ |
| const struct gl_renderbuffer *rb = |
| ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; |
| const bool is_float_depth = |
| _mesa_has_depth_float_channel(rb->InternalFormat); |
| ctx->Depth.Clear = is_float_depth ? *value : SATURATE(*value); |
| |
| ctx->Driver.Clear(ctx, BUFFER_BIT_DEPTH); |
| ctx->Depth.Clear = clearSave; |
| } |
| /* clear depth buffer to value */ |
| break; |
| case GL_COLOR: |
| { |
| const GLbitfield mask = make_color_buffer_mask(ctx, drawbuffer); |
| if (!no_error && mask == INVALID_MASK) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferfv(drawbuffer=%d)", |
| drawbuffer); |
| return; |
| } |
| else if (mask && !ctx->RasterDiscard) { |
| union gl_color_union clearSave; |
| |
| /* save color */ |
| clearSave = ctx->Color.ClearColor; |
| /* set color */ |
| COPY_4V(ctx->Color.ClearColor.f, value); |
| /* clear buffer(s) */ |
| ctx->Driver.Clear(ctx, mask); |
| /* restore color */ |
| ctx->Color.ClearColor = clearSave; |
| } |
| } |
| break; |
| default: |
| if (!no_error) { |
| /* Page 498 of the PDF, section '17.4.3.1 Clearing Individual Buffers' |
| * of the OpenGL 4.5 spec states: |
| * |
| * "An INVALID_ENUM error is generated by ClearBufferfv and |
| * ClearNamedFramebufferfv if buffer is not COLOR or DEPTH." |
| */ |
| _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferfv(buffer=%s)", |
| _mesa_enum_to_string(buffer)); |
| } |
| return; |
| } |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_ClearBufferfv_no_error(GLenum buffer, GLint drawbuffer, |
| const GLfloat *value) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| clear_bufferfv(ctx, buffer, drawbuffer, value, true); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_ClearBufferfv(GLenum buffer, GLint drawbuffer, const GLfloat *value) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| clear_bufferfv(ctx, buffer, drawbuffer, value, false); |
| } |
| |
| |
| /** |
| * The ClearBuffer framework is so complicated and so riddled with the |
| * assumption that the framebuffer is bound that, for now, we will just fake |
| * direct state access clearing for the user. |
| */ |
| void GLAPIENTRY |
| _mesa_ClearNamedFramebufferfv(GLuint framebuffer, GLenum buffer, |
| GLint drawbuffer, const GLfloat *value) |
| { |
| GLint oldfb; |
| |
| _mesa_GetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &oldfb); |
| _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer); |
| _mesa_ClearBufferfv(buffer, drawbuffer, value); |
| _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, (GLuint) oldfb); |
| } |
| |
| |
| /** |
| * New in GL 3.0 |
| * Clear depth/stencil buffer only. |
| */ |
| static ALWAYS_INLINE void |
| clear_bufferfi(struct gl_context *ctx, GLenum buffer, GLint drawbuffer, |
| GLfloat depth, GLint stencil, bool no_error) |
| { |
| GLbitfield mask = 0; |
| |
| FLUSH_VERTICES(ctx, 0); |
| |
| if (!no_error) { |
| if (buffer != GL_DEPTH_STENCIL) { |
| _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferfi(buffer=%s)", |
| _mesa_enum_to_string(buffer)); |
| return; |
| } |
| |
| /* Page 264 (page 280 of the PDF) of the OpenGL 3.0 spec says: |
| * |
| * "ClearBuffer generates an INVALID VALUE error if buffer is |
| * COLOR and drawbuffer is less than zero, or greater than the |
| * value of MAX DRAW BUFFERS minus one; or if buffer is DEPTH, |
| * STENCIL, or DEPTH STENCIL and drawbuffer is not zero." |
| */ |
| if (drawbuffer != 0) { |
| _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferfi(drawbuffer=%d)", |
| drawbuffer); |
| return; |
| } |
| } |
| |
| if (ctx->RasterDiscard) |
| return; |
| |
| if (ctx->NewState) { |
| _mesa_update_state( ctx ); |
| } |
| |
| if (!no_error && ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { |
| _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, |
| "glClearBufferfi(incomplete framebuffer)"); |
| return; |
| } |
| |
| if (ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer) |
| mask |= BUFFER_BIT_DEPTH; |
| if (ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Renderbuffer) |
| mask |= BUFFER_BIT_STENCIL; |
| |
| if (mask) { |
| /* 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; |
| |
| /* clear buffers */ |
| ctx->Driver.Clear(ctx, mask); |
| |
| /* restore */ |
| ctx->Depth.Clear = clearDepthSave; |
| ctx->Stencil.Clear = clearStencilSave; |
| } |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_ClearBufferfi_no_error(GLenum buffer, GLint drawbuffer, |
| GLfloat depth, GLint stencil) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| clear_bufferfi(ctx, buffer, drawbuffer, depth, stencil, true); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_ClearBufferfi(GLenum buffer, GLint drawbuffer, |
| GLfloat depth, GLint stencil) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| clear_bufferfi(ctx, buffer, drawbuffer, depth, stencil, false); |
| } |
| |
| |
| /** |
| * The ClearBuffer framework is so complicated and so riddled with the |
| * assumption that the framebuffer is bound that, for now, we will just fake |
| * direct state access clearing for the user. |
| */ |
| void GLAPIENTRY |
| _mesa_ClearNamedFramebufferfi(GLuint framebuffer, GLenum buffer, |
| GLint drawbuffer, GLfloat depth, GLint stencil) |
| { |
| GLint oldfb; |
| |
| _mesa_GetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &oldfb); |
| _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer); |
| _mesa_ClearBufferfi(buffer, drawbuffer, depth, stencil); |
| _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, (GLuint) oldfb); |
| } |
