X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fscissor.c;h=b38db06bc863943e512f33466d9106b113e71461;hb=f8e4542bad7dd9bb97b2990947ef74dbb2ee75e4;hp=523f3c3ab833a6e5aa026f4cc1dd05327e616776;hpb=bee9964b29b2428ee75e2d1efc0e1d2c2518a417;p=mesa.git

diff --git a/src/mesa/main/scissor.c b/src/mesa/main/scissor.c
index 523f3c3ab83..b38db06bc86 100644
--- a/src/mesa/main/scissor.c
+++ b/src/mesa/main/scissor.c
@@ -1,6 +1,5 @@
 /*
  * Mesa 3-D graphics library
- * Version:  7.1
  *
  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  *
@@ -17,25 +16,85 @@
  * 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 "main/glheader.h"
 #include "main/context.h"
+#include "main/enums.h"
+#include "main/mtypes.h"
 #include "main/scissor.h"
 
 
+/**
+ * Set scissor rectangle data directly in ScissorArray
+ *
+ * This is an internal function that performs no error checking on the
+ * supplied data.  It also does \b not call \c dd_function_table::Scissor.
+ *
+ * \sa _mesa_set_scissor
+ */
+static void
+set_scissor_no_notify(struct gl_context *ctx, unsigned idx,
+                      GLint x, GLint y, GLsizei width, GLsizei height)
+{
+   if (x == ctx->Scissor.ScissorArray[idx].X &&
+       y == ctx->Scissor.ScissorArray[idx].Y &&
+       width == ctx->Scissor.ScissorArray[idx].Width &&
+       height == ctx->Scissor.ScissorArray[idx].Height)
+      return;
+
+   FLUSH_VERTICES(ctx, ctx->DriverFlags.NewScissorRect ? 0 : _NEW_SCISSOR);
+   ctx->NewDriverState |= ctx->DriverFlags.NewScissorRect;
+
+   ctx->Scissor.ScissorArray[idx].X = x;
+   ctx->Scissor.ScissorArray[idx].Y = y;
+   ctx->Scissor.ScissorArray[idx].Width = width;
+   ctx->Scissor.ScissorArray[idx].Height = height;
+}
+
+static void
+scissor(struct gl_context *ctx, GLint x, GLint y, GLsizei width, GLsizei height)
+{
+   unsigned i;
+
+   /* The GL_ARB_viewport_array spec says:
+    *
+    *     "Scissor sets the scissor rectangle for all viewports to the same
+    *     values and is equivalent (assuming no errors are generated) to:
+    *
+    *     for (uint i = 0; i < MAX_VIEWPORTS; i++) {
+    *         ScissorIndexed(i, left, bottom, width, height);
+    *     }"
+    *
+    * Set the scissor rectangle for all of the viewports supported by the
+    * implementation, but only signal the driver once at the end.
+    */
+   for (i = 0; i < ctx->Const.MaxViewports; i++)
+      set_scissor_no_notify(ctx, i, x, y, width, height);
+
+   if (ctx->Driver.Scissor)
+      ctx->Driver.Scissor(ctx);
+}
+
 /**
  * Called via glScissor
  */
 void GLAPIENTRY
-_mesa_Scissor( GLint x, GLint y, GLsizei width, GLsizei height )
+_mesa_Scissor_no_error(GLint x, GLint y, GLsizei width, GLsizei height)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   scissor(ctx, x, y, width, height);
+}
+
+void GLAPIENTRY
+_mesa_Scissor(GLint x, GLint y, GLsizei width, GLsizei height)
 {
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx, "glScissor %d %d %d %d\n", x, y, width, height);
@@ -45,7 +104,7 @@ _mesa_Scissor( GLint x, GLint y, GLsizei width, GLsizei height )
       return;
    }
 
-   _mesa_set_scissor(ctx, x, y, width, height);
+   scissor(ctx, x, y, width, height);
 }
 
 
@@ -58,28 +117,197 @@ _mesa_Scissor( GLint x, GLint y, GLsizei width, GLsizei height )
  *
  * \sa glScissor().
  *
- * Verifies the parameters and updates __GLcontextRec::Scissor. On a
+ * Verifies the parameters and updates __struct gl_contextRec::Scissor. On a
  * change flushes the vertices and notifies the driver via
  * the dd_function_table::Scissor callback.
  */
 void
-_mesa_set_scissor(GLcontext *ctx, 
+_mesa_set_scissor(struct gl_context *ctx, unsigned idx,
                   GLint x, GLint y, GLsizei width, GLsizei height)
 {
-   if (x == ctx->Scissor.X &&
-       y == ctx->Scissor.Y &&
-       width == ctx->Scissor.Width &&
-       height == ctx->Scissor.Height)
-      return;
+   set_scissor_no_notify(ctx, idx, x, y, width, height);
 
-   FLUSH_VERTICES(ctx, _NEW_SCISSOR);
-   ctx->Scissor.X = x;
-   ctx->Scissor.Y = y;
-   ctx->Scissor.Width = width;
-   ctx->Scissor.Height = height;
+   if (ctx->Driver.Scissor)
+      ctx->Driver.Scissor(ctx);
+}
+
+static void
+scissor_array(struct gl_context *ctx, GLuint first, GLsizei count,
+              struct gl_scissor_rect *rect)
+{
+   for (GLsizei i = 0; i < count; i++) {
+      set_scissor_no_notify(ctx, i + first, rect[i].X, rect[i].Y,
+                            rect[i].Width, rect[i].Height);
+   }
 
    if (ctx->Driver.Scissor)
-      ctx->Driver.Scissor( ctx, x, y, width, height );
+      ctx->Driver.Scissor(ctx);
+}
+
+/**
+ * Define count scissor boxes starting at index.
+ *
+ * \param index  index of first scissor records to set
+ * \param count  number of scissor records to set
+ * \param x, y   pointer to array of struct gl_scissor_rects
+ *
+ * \sa glScissorArrayv().
+ *
+ * Verifies the parameters and call set_scissor_no_notify to do the work.
+ */
+void GLAPIENTRY
+_mesa_ScissorArrayv_no_error(GLuint first, GLsizei count, const GLint *v)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_scissor_rect *p = (struct gl_scissor_rect *)v;
+   scissor_array(ctx, first, count, p);
+}
+
+void GLAPIENTRY
+_mesa_ScissorArrayv(GLuint first, GLsizei count, const GLint *v)
+{
+   int i;
+   struct gl_scissor_rect *p = (struct gl_scissor_rect *) v;
+   GET_CURRENT_CONTEXT(ctx);
+
+   if ((first + count) > ctx->Const.MaxViewports) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glScissorArrayv: first (%d) + count (%d) >= MaxViewports (%d)",
+                  first, count, ctx->Const.MaxViewports);
+      return;
+   }
+
+   /* Verify width & height */
+   for (i = 0; i < count; i++) {
+      if (p[i].Width < 0 || p[i].Height < 0) {
+         _mesa_error(ctx, GL_INVALID_VALUE,
+                     "glScissorArrayv: index (%d) width or height < 0 (%d, %d)",
+                     i, p[i].Width, p[i].Height);
+         return;
+      }
+   }
+
+   scissor_array(ctx, first, count, p);
+}
+
+/**
+ * Define the scissor box.
+ *
+ * \param index  index of scissor records to set
+ * \param x, y   coordinates of the scissor box lower-left corner.
+ * \param width  width of the scissor box.
+ * \param height height of the scissor box.
+ *
+ * Verifies the parameters call set_scissor_no_notify to do the work.
+ */
+static void
+scissor_indexed_err(struct gl_context *ctx, GLuint index, GLint left,
+                    GLint bottom, GLsizei width, GLsizei height,
+                    const char *function)
+{
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "%s(%d, %d, %d, %d, %d)\n",
+                  function, index, left, bottom, width, height);
+
+   if (index >= ctx->Const.MaxViewports) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "%s: index (%d) >= MaxViewports (%d)",
+                  function, index, ctx->Const.MaxViewports);
+      return;
+   }
+
+   if (width < 0 || height < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "%s: index (%d) width or height < 0 (%d, %d)",
+                  function, index, width, height);
+      return;
+   }
+
+   _mesa_set_scissor(ctx, index, left, bottom, width, height);
+}
+
+void GLAPIENTRY
+_mesa_ScissorIndexed_no_error(GLuint index, GLint left, GLint bottom,
+                              GLsizei width, GLsizei height)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   _mesa_set_scissor(ctx, index, left, bottom, width, height);
+}
+
+void GLAPIENTRY
+_mesa_ScissorIndexed(GLuint index, GLint left, GLint bottom,
+                     GLsizei width, GLsizei height)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   scissor_indexed_err(ctx, index, left, bottom, width, height,
+                       "glScissorIndexed");
+}
+
+void GLAPIENTRY
+_mesa_ScissorIndexedv_no_error(GLuint index, const GLint *v)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   _mesa_set_scissor(ctx, index, v[0], v[1], v[2], v[3]);
+}
+
+void GLAPIENTRY
+_mesa_ScissorIndexedv(GLuint index, const GLint *v)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   scissor_indexed_err(ctx, index, v[0], v[1], v[2], v[3],
+                       "glScissorIndexedv");
+}
+
+void GLAPIENTRY
+_mesa_WindowRectanglesEXT(GLenum mode, GLsizei count, const GLint *box)
+{
+   int i;
+   struct gl_scissor_rect newval[MAX_WINDOW_RECTANGLES];
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "glWindowRectanglesEXT(%s, %d, %p)\n",
+                  _mesa_enum_to_string(mode), count, box);
+
+   if (mode != GL_INCLUSIVE_EXT && mode != GL_EXCLUSIVE_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glWindowRectanglesEXT(invalid mode 0x%x)", mode);
+      return;
+   }
+
+   if (count < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glWindowRectanglesEXT(count < 0)");
+      return;
+   }
+
+   if (count > ctx->Const.MaxWindowRectangles) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glWindowRectanglesEXT(count >= MaxWindowRectangles (%d)",
+                  ctx->Const.MaxWindowRectangles);
+      return;
+   }
+
+   for (i = 0; i < count; i++) {
+      if (box[2] < 0 || box[3] < 0) {
+         _mesa_error(ctx, GL_INVALID_VALUE,
+                     "glWindowRectanglesEXT(box %d: w < 0 || h < 0)", i);
+         return;
+      }
+      newval[i].X = box[0];
+      newval[i].Y = box[1];
+      newval[i].Width = box[2];
+      newval[i].Height = box[3];
+      box += 4;
+   }
+
+   FLUSH_VERTICES(ctx, 0);
+   ctx->NewDriverState |= ctx->DriverFlags.NewWindowRectangles;
+
+   memcpy(ctx->Scissor.WindowRects, newval,
+          sizeof(struct gl_scissor_rect) * count);
+   ctx->Scissor.NumWindowRects = count;
+   ctx->Scissor.WindowRectMode = mode;
 }
 
 
@@ -88,12 +316,17 @@ _mesa_set_scissor(GLcontext *ctx,
  * \param ctx  the GL context.
  */
 void
-_mesa_init_scissor(GLcontext *ctx)
+_mesa_init_scissor(struct gl_context *ctx)
 {
+   unsigned i;
+
    /* Scissor group */
-   ctx->Scissor.Enabled = GL_FALSE;
-   ctx->Scissor.X = 0;
-   ctx->Scissor.Y = 0;
-   ctx->Scissor.Width = 0;
-   ctx->Scissor.Height = 0;
+   ctx->Scissor.EnableFlags = 0;
+   ctx->Scissor.WindowRectMode = GL_EXCLUSIVE_EXT;
+
+   /* Note: ctx->Const.MaxViewports may not have been set by the driver yet,
+    * so just initialize all of them.
+    */
+   for (i = 0; i < MAX_VIEWPORTS; i++)
+      set_scissor_no_notify(ctx, i, 0, 0, 0, 0);
 }