/*
* 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 "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);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
+ scissor(ctx, x, y, width, height);
+}
+
+void GLAPIENTRY
+_mesa_Scissor(GLint x, GLint y, GLsizei width, GLsizei height)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glScissor %d %d %d %d\n", x, y, width, height);
if (width < 0 || height < 0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glScissor" );
return;
}
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glScissor %d %d %d %d\n", x, y, width, height);
-
- _mesa_set_scissor(ctx, x, y, width, height);
+ scissor(ctx, x, y, width, 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);
+
+ if (ctx->Driver.Scissor)
+ ctx->Driver.Scissor(ctx);
+}
- FLUSH_VERTICES(ctx, _NEW_SCISSOR);
- ctx->Scissor.X = x;
- ctx->Scissor.Y = y;
- ctx->Scissor.Width = width;
- ctx->Scissor.Height = height;
+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;
}
* \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);
}
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