/*
* Mesa 3-D graphics library
- * Version: 7.1
*
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
* 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.
+ * 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.
*/
#include "glheader.h"
#include "clear.h"
#include "context.h"
-#include "colormac.h"
+#include "enums.h"
+#include "fbobject.h"
+#include "get.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;
-
- if (!ctx->Visual.rgbMode && ctx->Driver.ClearIndex) {
- /* it's OK to call glClearIndex in RGBA mode but it should be a NOP */
- (*ctx->Driver.ClearIndex)( ctx, ctx->Color.ClearIndex );
- }
}
-#endif
/**
* \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);
+ ctx->Color.ClearColor.f[0] = red;
+ ctx->Color.ClearColor.f[1] = green;
+ ctx->Color.ClearColor.f[2] = blue;
+ ctx->Color.ClearColor.f[3] = alpha;
+}
+
- if (TEST_EQ_4V(tmp, ctx->Color.ClearColor))
- return; /* no change */
+/**
+ * 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;
+}
- FLUSH_VERTICES(ctx, _NEW_COLOR);
- COPY_4V(ctx->Color.ClearColor, tmp);
- if (ctx->Visual.rgbMode && ctx->Driver.ClearColor) {
- /* it's OK to call glClearColor in CI mode but it should be a NOP */
- (*ctx->Driver.ClearColor)(ctx, ctx->Color.ClearColor);
+/**
+ * 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;
+ GLubyte colorMask = 0;
+
+ if (rb) {
+ for (c = 0; c < 4; c++) {
+ if (_mesa_format_has_color_component(rb->Format, c))
+ colorMask |= ctx->Color.ColorMask[idx][c];
+ }
}
+
+ return colorMask != 0;
}
/**
* Clear buffers.
- *
+ *
* \param mask bit-mask indicating the buffers to be cleared.
*
- * Flushes the vertices and verifies the parameter. If __GLcontextRec::NewState
- * is set then calls _mesa_update_state() to update gl_frame_buffer::_Xmin,
- * etc. If the rasterization mode is set to GL_RENDER then requests the driver
- * to clear the buffers, via the dd_function_table::Clear callback.
- */
+ * 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_VERTICES(ctx, 0);
FLUSH_CURRENT(ctx, 0);
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 */
}
return;
}
- if (ctx->DrawBuffer->Width == 0 || ctx->DrawBuffer->Height == 0 ||
- ctx->DrawBuffer->_Xmin >= ctx->DrawBuffer->_Xmax ||
- ctx->DrawBuffer->_Ymin >= ctx->DrawBuffer->_Ymax)
+ if (ctx->RasterDiscard)
return;
if (ctx->RenderMode == GL_RENDER) {
if (mask & GL_COLOR_BUFFER_BIT) {
GLuint i;
for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) {
- bufferMask |= (1 << ctx->DrawBuffer->_ColorDrawBufferIndexes[i]);
+ GLint buf = ctx->DrawBuffer->_ColorDrawBufferIndexes[i];
+
+ if (buf >= 0 && color_buffer_writes_enabled(ctx, i)) {
+ bufferMask |= 1 << buf;
+ }
}
}
bufferMask |= BUFFER_BIT_ACCUM;
}
- ASSERT(ctx->Driver.Clear);
+ assert(ctx->Driver.Clear);
ctx->Driver.Clear(ctx, bufferMask);
}
}
+
+
+/** 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:
+ 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:
+ {
+ GLint buf = ctx->DrawBuffer->_ColorDrawBufferIndexes[drawbuffer];
+
+ if (buf >= 0 && att[buf].Renderbuffer) {
+ mask |= 1 << buf;
+ }
+ }
+ }
+
+ 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);
+ FLUSH_VERTICES(ctx, 0);
+
+ FLUSH_CURRENT(ctx, 0);
+
+ if (ctx->NewState) {
+ _mesa_update_state( ctx );
+ }
+
+ 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 (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 (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;
+ case GL_DEPTH:
+ /* Page 264 (page 280 of the PDF) of the OpenGL 3.0 spec says:
+ *
+ * "The result of ClearBuffer is undefined if no conversion between
+ * the type of the specified value and the type of the buffer being
+ * cleared is defined (for example, if ClearBufferiv is called for a
+ * fixed- or floating-point buffer, or if ClearBufferfv is called
+ * for a signed or unsigned integer buffer). This is not an error."
+ *
+ * In this case we take "undefined" and "not an error" to mean "ignore."
+ * Note that we still need to generate an error for the invalid
+ * drawbuffer case (see the GL_STENCIL case above).
+ */
+ if (drawbuffer != 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferiv(drawbuffer=%d)",
+ drawbuffer);
+ return;
+ }
+ return;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferiv(buffer=%s)",
+ _mesa_enum_to_string(buffer));
+ return;
+ }
+}
+
+
+/**
+ * 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).
+ */
+void GLAPIENTRY
+_mesa_ClearBufferuiv(GLenum buffer, GLint drawbuffer, const GLuint *value)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ FLUSH_VERTICES(ctx, 0);
+ 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 && !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;
+ case GL_DEPTH:
+ case GL_STENCIL:
+ /* Page 264 (page 280 of the PDF) of the OpenGL 3.0 spec says:
+ *
+ * "The result of ClearBuffer is undefined if no conversion between
+ * the type of the specified value and the type of the buffer being
+ * cleared is defined (for example, if ClearBufferiv is called for a
+ * fixed- or floating-point buffer, or if ClearBufferfv is called
+ * for a signed or unsigned integer buffer). This is not an error."
+ *
+ * In this case we take "undefined" and "not an error" to mean "ignore."
+ * Even though we could do something sensible for GL_STENCIL, page 263
+ * (page 279 of the PDF) says:
+ *
+ * "Only ClearBufferiv should be used to clear stencil buffers."
+ *
+ * Note that we still need to generate an error for the invalid
+ * drawbuffer case (see the GL_STENCIL case in _mesa_ClearBufferiv).
+ */
+ if (drawbuffer != 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferuiv(drawbuffer=%d)",
+ drawbuffer);
+ return;
+ }
+ return;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferuiv(buffer=%s)",
+ _mesa_enum_to_string(buffer));
+ return;
+ }
+}
+
+
+/**
+ * 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).
+ */
+void GLAPIENTRY
+_mesa_ClearBufferfv(GLenum buffer, GLint drawbuffer, const GLfloat *value)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ FLUSH_VERTICES(ctx, 0);
+ FLUSH_CURRENT(ctx, 0);
+
+ if (ctx->NewState) {
+ _mesa_update_state( ctx );
+ }
+
+ 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 (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;
+ ctx->Depth.Clear = *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 (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;
+ case GL_STENCIL:
+ /* Page 264 (page 280 of the PDF) of the OpenGL 3.0 spec says:
+ *
+ * "The result of ClearBuffer is undefined if no conversion between
+ * the type of the specified value and the type of the buffer being
+ * cleared is defined (for example, if ClearBufferiv is called for a
+ * fixed- or floating-point buffer, or if ClearBufferfv is called
+ * for a signed or unsigned integer buffer). This is not an error."
+ *
+ * In this case we take "undefined" and "not an error" to mean "ignore."
+ * Note that we still need to generate an error for the invalid
+ * drawbuffer case (see the GL_DEPTH case above).
+ */
+ if (drawbuffer != 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glClearBufferfv(drawbuffer=%d)",
+ drawbuffer);
+ return;
+ }
+ return;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferfv(buffer=%s)",
+ _mesa_enum_to_string(buffer));
+ return;
+ }
+}
+
+
+/**
+ * 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.
+ */
+void GLAPIENTRY
+_mesa_ClearBufferfi(GLenum buffer, GLint drawbuffer,
+ GLfloat depth, GLint stencil)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ GLbitfield mask = 0;
+
+ FLUSH_VERTICES(ctx, 0);
+ FLUSH_CURRENT(ctx, 0);
+
+ 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 (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;
+ }
+}
+
+
+/**
+ * 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,
+ GLfloat depth, GLint stencil)
+{
+ GLint oldfb;
+
+ _mesa_GetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &oldfb);
+ _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer);
+ _mesa_ClearBufferfi(buffer, 0, depth, stencil);
+ _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, (GLuint) oldfb);
+}
projects / mesa.git / blobdiff