/*
* 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;
}
-#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] = red;
- tmp[1] = green;
- tmp[2] = blue;
- tmp[3] = alpha;
-
- if (TEST_EQ_4V(tmp, ctx->Color.ClearColor.f))
- return; /* no change */
- FLUSH_VERTICES(ctx, _NEW_COLOR);
- COPY_4V(ctx->Color.ClearColor.f, tmp);
-
- 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);
- }
+ ctx->Color.ClearColor.f[0] = red;
+ ctx->Color.ClearColor.f[1] = green;
+ ctx->Color.ClearColor.f[2] = blue;
+ ctx->Color.ClearColor.f[3] = alpha;
}
void GLAPIENTRY
_mesa_ClearColorIiEXT(GLint r, GLint g, GLint b, GLint a)
{
- GLint tmp[4];
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- tmp[0] = r;
- tmp[1] = g;
- tmp[2] = b;
- tmp[3] = a;
- if (TEST_EQ_4V(tmp, ctx->Color.ClearColor.i))
- return; /* no change */
-
- FLUSH_VERTICES(ctx, _NEW_COLOR);
- COPY_4V(ctx->Color.ClearColor.i, tmp);
-
- /* these should be NOP calls for drivers supporting EXT_texture_integer */
- if (ctx->Driver.ClearColor) {
- ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor);
- }
+ ctx->Color.ClearColor.i[0] = r;
+ ctx->Color.ClearColor.i[1] = g;
+ ctx->Color.ClearColor.i[2] = b;
+ ctx->Color.ClearColor.i[3] = a;
}
void GLAPIENTRY
_mesa_ClearColorIuiEXT(GLuint r, GLuint g, GLuint b, GLuint a)
{
- GLuint tmp[4];
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
- tmp[0] = r;
- tmp[1] = g;
- tmp[2] = b;
- tmp[3] = a;
-
- if (TEST_EQ_4V(tmp, ctx->Color.ClearColor.ui))
- return; /* no change */
+ 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.ui, tmp);
- /* these should be NOP calls for drivers supporting EXT_texture_integer */
- if (ctx->Driver.ClearColor) {
- 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 __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 )
{
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)
- return;
-
if (ctx->RasterDiscard)
return;
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 ~0x0
+#define INVALID_MASK ~0x0U
/**
const struct gl_renderbuffer_attachment *att = ctx->DrawBuffer->Attachment;
GLbitfield mask = 0x0;
- switch (drawbuffer) {
+ /* 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;
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);
+ {
+ GLint buf = ctx->DrawBuffer->_ColorDrawBufferIndexes[drawbuffer];
+
+ if (buf >= 0 && att[buf].Renderbuffer) {
+ mask |= 1 << buf;
+ }
}
}
_mesa_ClearBufferiv(GLenum buffer, GLint drawbuffer, const GLint *value)
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+ FLUSH_VERTICES(ctx, 0);
FLUSH_CURRENT(ctx, 0);
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()
*/
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:
clearSave = ctx->Color.ClearColor;
/* set color */
COPY_4V(ctx->Color.ClearColor.i, value);
- if (ctx->Driver.ClearColor)
- ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor);
/* clear buffer(s) */
ctx->Driver.Clear(ctx, mask);
/* restore color */
ctx->Color.ClearColor = clearSave;
- if (ctx->Driver.ClearColor)
- ctx->Driver.ClearColor(ctx, clearSave);
}
}
break;
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).
_mesa_ClearBufferuiv(GLenum buffer, GLint drawbuffer, const GLuint *value)
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+ FLUSH_VERTICES(ctx, 0);
FLUSH_CURRENT(ctx, 0);
if (ctx->NewState) {
clearSave = ctx->Color.ClearColor;
/* set color */
COPY_4V(ctx->Color.ClearColor.ui, value);
- if (ctx->Driver.ClearColor)
- ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor);
/* clear buffer(s) */
ctx->Driver.Clear(ctx, mask);
/* restore color */
ctx->Color.ClearColor = clearSave;
- if (ctx->Driver.ClearColor)
- ctx->Driver.ClearColor(ctx, clearSave);
}
}
break;
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).
_mesa_ClearBufferfv(GLenum buffer, GLint drawbuffer, const GLfloat *value)
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+ FLUSH_VERTICES(ctx, 0);
FLUSH_CURRENT(ctx, 0);
if (ctx->NewState) {
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()
*/
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;
/* save color */
clearSave = ctx->Color.ClearColor;
/* set color */
- COPY_4V_CAST(ctx->Color.ClearColor.f, value, GLclampf);
- if (ctx->Driver.ClearColor)
- ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor);
+ COPY_4V(ctx->Color.ClearColor.f, value);
/* clear buffer(s) */
ctx->Driver.Clear(ctx, mask);
/* restore color */
ctx->Color.ClearColor = clearSave;
- if (ctx->Driver.ClearColor)
- ctx->Driver.ClearColor(ctx, clearSave);
}
}
break;
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.
GET_CURRENT_CONTEXT(ctx);
GLbitfield mask = 0;
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
-
+ FLUSH_VERTICES(ctx, 0);
FLUSH_CURRENT(ctx, 0);
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;
}
/* 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, mask);
/* 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);
}
}
+
+
+/**
+ * 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);
+}
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