st/mesa: add support for GL_ARB_viewport_array (v0.2)
this just ties the mesa code to the pre-existing gallium interface, I'm not sure what to do with the CSO stuff yet. 0.2: fix min/max bounds Acked-by: Ilia Mirkin <imirkin@alum.mit.edu> Signed-off-by: Dave Airlie <airlied@redhat.com>
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@ -43,51 +43,56 @@
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static void
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update_scissor( struct st_context *st )
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{
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struct pipe_scissor_state scissor;
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struct pipe_scissor_state scissor[PIPE_MAX_VIEWPORTS];
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const struct gl_context *ctx = st->ctx;
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const struct gl_framebuffer *fb = ctx->DrawBuffer;
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GLint miny, maxy;
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int i;
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bool changed = false;
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for (i = 0 ; i < ctx->Const.MaxViewports; i++) {
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scissor[i].minx = 0;
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scissor[i].miny = 0;
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scissor[i].maxx = fb->Width;
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scissor[i].maxy = fb->Height;
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scissor.minx = 0;
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scissor.miny = 0;
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scissor.maxx = fb->Width;
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scissor.maxy = fb->Height;
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if (ctx->Scissor.EnableFlags & (1 << i)) {
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/* need to be careful here with xmax or ymax < 0 */
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GLint xmax = MAX2(0, ctx->Scissor.ScissorArray[i].X + ctx->Scissor.ScissorArray[i].Width);
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GLint ymax = MAX2(0, ctx->Scissor.ScissorArray[i].Y + ctx->Scissor.ScissorArray[i].Height);
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if (ctx->Scissor.EnableFlags & 1) {
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/* need to be careful here with xmax or ymax < 0 */
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GLint xmax = MAX2(0, ctx->Scissor.ScissorArray[0].X + ctx->Scissor.ScissorArray[0].Width);
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GLint ymax = MAX2(0, ctx->Scissor.ScissorArray[0].Y + ctx->Scissor.ScissorArray[0].Height);
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if (ctx->Scissor.ScissorArray[i].X > (GLint)scissor[i].minx)
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scissor[i].minx = ctx->Scissor.ScissorArray[i].X;
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if (ctx->Scissor.ScissorArray[i].Y > (GLint)scissor[i].miny)
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scissor[i].miny = ctx->Scissor.ScissorArray[i].Y;
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if (ctx->Scissor.ScissorArray[0].X > (GLint)scissor.minx)
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scissor.minx = ctx->Scissor.ScissorArray[0].X;
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if (ctx->Scissor.ScissorArray[0].Y > (GLint)scissor.miny)
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scissor.miny = ctx->Scissor.ScissorArray[0].Y;
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if (xmax < (GLint) scissor[i].maxx)
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scissor[i].maxx = xmax;
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if (ymax < (GLint) scissor[i].maxy)
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scissor[i].maxy = ymax;
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/* check for null space */
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if (scissor[i].minx >= scissor[i].maxx || scissor[i].miny >= scissor[i].maxy)
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scissor[i].minx = scissor[i].miny = scissor[i].maxx = scissor[i].maxy = 0;
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}
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if (xmax < (GLint) scissor.maxx)
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scissor.maxx = xmax;
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if (ymax < (GLint) scissor.maxy)
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scissor.maxy = ymax;
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/* Now invert Y if needed.
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* Gallium drivers use the convention Y=0=top for surfaces.
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*/
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if (st_fb_orientation(fb) == Y_0_TOP) {
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miny = fb->Height - scissor[i].maxy;
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maxy = fb->Height - scissor[i].miny;
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scissor[i].miny = miny;
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scissor[i].maxy = maxy;
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}
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/* check for null space */
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if (scissor.minx >= scissor.maxx || scissor.miny >= scissor.maxy)
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scissor.minx = scissor.miny = scissor.maxx = scissor.maxy = 0;
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}
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/* Now invert Y if needed.
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* Gallium drivers use the convention Y=0=top for surfaces.
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*/
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if (st_fb_orientation(fb) == Y_0_TOP) {
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miny = fb->Height - scissor.maxy;
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maxy = fb->Height - scissor.miny;
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scissor.miny = miny;
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scissor.maxy = maxy;
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}
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if (memcmp(&scissor, &st->state.scissor, sizeof(scissor)) != 0) {
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/* state has changed */
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st->state.scissor = scissor; /* struct copy */
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st->pipe->set_scissor_states(st->pipe, 0, 1, &scissor); /* activate */
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if (memcmp(&scissor[i], &st->state.scissor[i], sizeof(scissor)) != 0) {
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/* state has changed */
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st->state.scissor[i] = scissor[i]; /* struct copy */
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changed = true;
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}
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}
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if (changed)
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st->pipe->set_scissor_states(st->pipe, 0, ctx->Const.MaxViewports, scissor); /* activate */
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}
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@ -43,7 +43,7 @@ update_viewport( struct st_context *st )
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{
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struct gl_context *ctx = st->ctx;
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GLfloat yScale, yBias;
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int i;
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/* _NEW_BUFFERS
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*/
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if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
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@ -61,26 +61,29 @@ update_viewport( struct st_context *st )
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/* _NEW_VIEWPORT
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*/
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for (i = 0; i < ctx->Const.MaxViewports; i++)
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{
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GLfloat x = ctx->ViewportArray[0].X;
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GLfloat y = ctx->ViewportArray[0].Y;
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GLfloat z = ctx->ViewportArray[0].Near;
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GLfloat half_width = ctx->ViewportArray[0].Width * 0.5f;
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GLfloat half_height = ctx->ViewportArray[0].Height * 0.5f;
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GLfloat half_depth = (GLfloat)(ctx->ViewportArray[0].Far - ctx->ViewportArray[0].Near) * 0.5f;
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GLfloat x = ctx->ViewportArray[i].X;
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GLfloat y = ctx->ViewportArray[i].Y;
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GLfloat z = ctx->ViewportArray[i].Near;
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GLfloat half_width = ctx->ViewportArray[i].Width * 0.5f;
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GLfloat half_height = ctx->ViewportArray[i].Height * 0.5f;
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GLfloat half_depth = (GLfloat)(ctx->ViewportArray[i].Far - ctx->ViewportArray[i].Near) * 0.5f;
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st->state.viewport.scale[0] = half_width;
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st->state.viewport.scale[1] = half_height * yScale;
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st->state.viewport.scale[2] = half_depth;
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st->state.viewport.scale[3] = 1.0;
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st->state.viewport[i].scale[0] = half_width;
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st->state.viewport[i].scale[1] = half_height * yScale;
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st->state.viewport[i].scale[2] = half_depth;
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st->state.viewport[i].scale[3] = 1.0;
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st->state.viewport.translate[0] = half_width + x;
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st->state.viewport.translate[1] = (half_height + y) * yScale + yBias;
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st->state.viewport.translate[2] = half_depth + z;
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st->state.viewport.translate[3] = 0.0;
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cso_set_viewport(st->cso_context, &st->state.viewport);
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st->state.viewport[i].translate[0] = half_width + x;
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st->state.viewport[i].translate[1] = (half_height + y) * yScale + yBias;
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st->state.viewport[i].translate[2] = half_depth + z;
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st->state.viewport[i].translate[3] = 0.0;
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}
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cso_set_viewport(st->cso_context, &st->state.viewport[0]);
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if (ctx->Const.MaxViewports > 1)
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st->pipe->set_viewport_states(st->pipe, 1, ctx->Const.MaxViewports - 1, &st->state.viewport[1]);
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}
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@ -115,8 +115,8 @@ struct st_context
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unsigned size;
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} constants[PIPE_SHADER_TYPES];
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struct pipe_framebuffer_state framebuffer;
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struct pipe_scissor_state scissor;
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struct pipe_viewport_state viewport;
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struct pipe_scissor_state scissor[PIPE_MAX_VIEWPORTS];
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struct pipe_viewport_state viewport[PIPE_MAX_VIEWPORTS];
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unsigned sample_mask;
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GLuint poly_stipple[32]; /**< In OpenGL's bottom-to-top order */
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@ -156,7 +156,7 @@ st_feedback_draw_vbo(struct gl_context *ctx,
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* code sends state updates to the pipe, not to our private draw module.
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*/
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assert(draw);
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draw_set_viewport_states(draw, 0, 1, &st->state.viewport);
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draw_set_viewport_states(draw, 0, 1, &st->state.viewport[0]);
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draw_set_clip_state(draw, &st->state.clip);
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draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
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draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
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@ -779,4 +779,13 @@ void st_init_extensions(struct st_context *st)
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if (!ctx->Extensions.EXT_transform_feedback)
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ctx->Const.DisableVaryingPacking = GL_TRUE;
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}
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if (ctx->API == API_OPENGL_CORE) {
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ctx->Const.MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
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if (ctx->Const.MaxViewports >= 16) {
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ctx->Const.ViewportBounds.Min = -(float)ctx->Const.MaxViewportWidth;
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ctx->Const.ViewportBounds.Max = ctx->Const.MaxViewportWidth;
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ctx->Extensions.ARB_viewport_array = GL_TRUE;
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}
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}
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}
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