#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"
* \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 )
}
+/**
+ * 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 __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.
- */
+ * 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 )
{
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->RasterDiscard)
return;
for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) {
GLint buf = ctx->DrawBuffer->_ColorDrawBufferIndexes[i];
- if (buf >= 0) {
+ 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 ~0x0
+#define INVALID_MASK ~0x0U
/**
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)
break;
default:
{
- GLuint buf = ctx->DrawBuffer->_ColorDrawBufferIndexes[drawbuffer];
+ GLint buf = ctx->DrawBuffer->_ColorDrawBufferIndexes[drawbuffer];
if (buf >= 0 && att[buf].Renderbuffer) {
mask |= 1 << buf;
drawbuffer);
return;
}
- else if (ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Renderbuffer && !ctx->RasterDiscard) {
+ 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()
}
}
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."
+ default:
+ /* Page 498 of the PDF, section '17.4.3.1 Clearing Individual Buffers'
+ * of the OpenGL 4.5 spec states:
*
- * 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).
+ * "An INVALID_ENUM error is generated by ClearBufferiv and
+ * ClearNamedFramebufferiv if buffer is not COLOR or STENCIL."
*/
- 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_lookup_enum_by_nr(buffer));
+ _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).
}
}
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."
+ default:
+ /* Page 498 of the PDF, section '17.4.3.1 Clearing Individual Buffers'
+ * of the OpenGL 4.5 spec states:
*
- * Note that we still need to generate an error for the invalid
- * drawbuffer case (see the GL_STENCIL case in _mesa_ClearBufferiv).
+ * "An INVALID_ENUM error is generated by ClearBufferuiv and
+ * ClearNamedFramebufferuiv if buffer is not COLOR."
*/
- 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_lookup_enum_by_nr(buffer));
+ _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).
drawbuffer);
return;
}
- else if (ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer && !ctx->RasterDiscard) {
+ 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()
}
}
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."
+ default:
+ /* Page 498 of the PDF, section '17.4.3.1 Clearing Individual Buffers'
+ * of the OpenGL 4.5 spec states:
*
- * 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).
+ * "An INVALID_ENUM error is generated by ClearBufferfv and
+ * ClearNamedFramebufferfv if buffer is not COLOR or DEPTH."
*/
- 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_lookup_enum_by_nr(buffer));
+ _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.
if (buffer != GL_DEPTH_STENCIL) {
_mesa_error(ctx, GL_INVALID_ENUM, "glClearBufferfi(buffer=%s)",
- _mesa_lookup_enum_by_nr(buffer));
+ _mesa_enum_to_string(buffer));
return;
}
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,
+ 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);
+}
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