#include "main/viewport.h"
#include "st_context.h"
#include "st_atom.h"
+#include "st_util.h"
#include "pipe/p_context.h"
#include "cso_cache/cso_context.h"
+static enum pipe_viewport_swizzle
+viewport_swizzle_from_glenum(GLenum16 swizzle)
+{
+ return swizzle - GL_VIEWPORT_SWIZZLE_POSITIVE_X_NV;
+}
+
/**
* Update the viewport transformation matrix. Depends on:
* - viewport pos/size
* - depthrange
* - window pos/size or FBO size
*/
-static void
-update_viewport( struct st_context *st )
+void
+st_update_viewport( struct st_context *st )
{
struct gl_context *ctx = st->ctx;
- GLfloat yScale, yBias;
unsigned i;
- /* _NEW_BUFFERS
- */
- if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
- /* Drawing to a window. The corresponding gallium surface uses
- * Y=0=TOP but OpenGL is Y=0=BOTTOM. So we need to invert the viewport.
- */
- yScale = -1;
- yBias = (GLfloat)ctx->DrawBuffer->Height;
- }
- else {
- /* Drawing to an FBO where Y=0=BOTTOM, like OpenGL - don't invert */
- yScale = 1.0;
- yBias = 0.0;
- }
/* _NEW_VIEWPORT
*/
- for (i = 0; i < ctx->Const.MaxViewports; i++)
- {
- float scale[3], translate[3];
+ for (i = 0; i < st->state.num_viewports; i++) {
+ float *scale = st->state.viewport[i].scale;
+ float *translate = st->state.viewport[i].translate;
+
_mesa_get_viewport_xform(ctx, i, scale, translate);
- st->state.viewport[i].scale[0] = scale[0];
- st->state.viewport[i].scale[1] = scale[1] * yScale;
- st->state.viewport[i].scale[2] = scale[2];
+ /* _NEW_BUFFERS */
+ /* Drawing to a window where the coordinate system is upside down. */
+ if (st->state.fb_orientation == Y_0_TOP) {
+ scale[1] *= -1;
+ translate[1] = st->state.fb_height - translate[1];
+ }
- st->state.viewport[i].translate[0] = translate[0];
- st->state.viewport[i].translate[1] = translate[1] * yScale + yBias;
- st->state.viewport[i].translate[2] = translate[2];
+ st->state.viewport[i].swizzle_x = viewport_swizzle_from_glenum(ctx->ViewportArray[i].SwizzleX);
+ st->state.viewport[i].swizzle_y = viewport_swizzle_from_glenum(ctx->ViewportArray[i].SwizzleY);
+ st->state.viewport[i].swizzle_z = viewport_swizzle_from_glenum(ctx->ViewportArray[i].SwizzleZ);
+ st->state.viewport[i].swizzle_w = viewport_swizzle_from_glenum(ctx->ViewportArray[i].SwizzleW);
}
cso_set_viewport(st->cso_context, &st->state.viewport[0]);
- if (ctx->Const.MaxViewports > 1)
- st->pipe->set_viewport_states(st->pipe, 1, ctx->Const.MaxViewports - 1, &st->state.viewport[1]);
-}
+ if (st->state.num_viewports > 1) {
+ struct pipe_context *pipe = st->pipe;
-const struct st_tracked_state st_update_viewport = {
- "st_update_viewport", /* name */
- { /* dirty */
- _NEW_BUFFERS | _NEW_VIEWPORT, /* mesa */
- 0, /* st */
- },
- update_viewport /* update */
-};
+ pipe->set_viewport_states(pipe, 1, st->state.num_viewports - 1,
+ &st->state.viewport[1]);
+ }
+}