X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fclear.c;h=b011da04b46d3f4c9587d13d6e48752073374ddf;hb=cd6a31cd4a9ea6deef4778c2eaef2d47240c3a6e;hp=a6257f9b982da24d97a7ae8a6993e69cefe30fae;hpb=89ab66448e1bcd78caab6678261c2885dcff741c;p=mesa.git

diff --git a/src/mesa/main/clear.c b/src/mesa/main/clear.c
index a6257f9b982..b011da04b46 100644
--- a/src/mesa/main/clear.c
+++ b/src/mesa/main/clear.c
@@ -34,6 +34,8 @@
 #include "clear.h"
 #include "context.h"
 #include "colormac.h"
+#include "enums.h"
+#include "macros.h"
 #include "state.h"
 
 
@@ -50,11 +52,6 @@ _mesa_ClearIndex( GLfloat c )
 
    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
 
@@ -91,7 +88,7 @@ _mesa_ClearColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha )
    FLUSH_VERTICES(ctx, _NEW_COLOR);
    COPY_4V(ctx->Color.ClearColor, tmp);
 
-   if (ctx->Visual.rgbMode && ctx->Driver.ClearColor) {
+   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);
    }
@@ -103,7 +100,7 @@ _mesa_ClearColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha )
  * 
  * \param mask bit-mask indicating the buffers to be cleared.
  *
- * Flushes the vertices and verifies the parameter. If __GLcontextRec::NewState
+ * 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.
@@ -114,6 +111,8 @@ _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);
 
@@ -180,3 +179,326 @@ _mesa_Clear( GLbitfield mask )
       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, "glClearBufferiv(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);
+   }
+}