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st/mesa: add support for GL_ARB_viewport_array (v0.2)

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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>
This commit is contained in:
Dave Airlie 2014-01-21 15:26:29 +10:00
parent c116ee6042
commit 0705fa35cd
5 changed files with 73 additions and 56 deletions
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77
src/mesa/state_tracker/st_atom_scissor.c
View file

@ -43,51 +43,56 @@
static void static void
update_scissor( struct st_context *st ) update_scissor( struct st_context *st )
{ {
struct pipe_scissor_state scissor; struct pipe_scissor_state scissor[PIPE_MAX_VIEWPORTS];
const struct gl_context *ctx = st->ctx; const struct gl_context *ctx = st->ctx;
const struct gl_framebuffer *fb = ctx->DrawBuffer; const struct gl_framebuffer *fb = ctx->DrawBuffer;
GLint miny, maxy; GLint miny, maxy;
int i;
bool changed = false;
for (i = 0 ; i < ctx->Const.MaxViewports; i++) {
scissor[i].minx = 0;
scissor[i].miny = 0;
scissor[i].maxx = fb->Width;
scissor[i].maxy = fb->Height;
scissor.minx = 0; if (ctx->Scissor.EnableFlags & (1 << i)) {
scissor.miny = 0; /* need to be careful here with xmax or ymax < 0 */
scissor.maxx = fb->Width; GLint xmax = MAX2(0, ctx->Scissor.ScissorArray[i].X + ctx->Scissor.ScissorArray[i].Width);
scissor.maxy = fb->Height; GLint ymax = MAX2(0, ctx->Scissor.ScissorArray[i].Y + ctx->Scissor.ScissorArray[i].Height);
if (ctx->Scissor.EnableFlags & 1) { if (ctx->Scissor.ScissorArray[i].X > (GLint)scissor[i].minx)
/* need to be careful here with xmax or ymax < 0 */ scissor[i].minx = ctx->Scissor.ScissorArray[i].X;
GLint xmax = MAX2(0, ctx->Scissor.ScissorArray[0].X + ctx->Scissor.ScissorArray[0].Width); if (ctx->Scissor.ScissorArray[i].Y > (GLint)scissor[i].miny)
GLint ymax = MAX2(0, ctx->Scissor.ScissorArray[0].Y + ctx->Scissor.ScissorArray[0].Height); scissor[i].miny = ctx->Scissor.ScissorArray[i].Y;
if (ctx->Scissor.ScissorArray[0].X > (GLint)scissor.minx) if (xmax < (GLint) scissor[i].maxx)
scissor.minx = ctx->Scissor.ScissorArray[0].X; scissor[i].maxx = xmax;
if (ctx->Scissor.ScissorArray[0].Y > (GLint)scissor.miny) if (ymax < (GLint) scissor[i].maxy)
scissor.miny = ctx->Scissor.ScissorArray[0].Y; scissor[i].maxy = ymax;
/* check for null space */
if (scissor[i].minx >= scissor[i].maxx || scissor[i].miny >= scissor[i].maxy)
scissor[i].minx = scissor[i].miny = scissor[i].maxx = scissor[i].maxy = 0;
}
if (xmax < (GLint) scissor.maxx) /* Now invert Y if needed.
scissor.maxx = xmax; * Gallium drivers use the convention Y=0=top for surfaces.
if (ymax < (GLint) scissor.maxy) */
scissor.maxy = ymax; if (st_fb_orientation(fb) == Y_0_TOP) {
miny = fb->Height - scissor[i].maxy;
maxy = fb->Height - scissor[i].miny;
scissor[i].miny = miny;
scissor[i].maxy = maxy;
}
/* check for null space */ if (memcmp(&scissor[i], &st->state.scissor[i], sizeof(scissor)) != 0) {
if (scissor.minx >= scissor.maxx || scissor.miny >= scissor.maxy) /* state has changed */
scissor.minx = scissor.miny = scissor.maxx = scissor.maxy = 0; st->state.scissor[i] = scissor[i]; /* struct copy */
} changed = true;
}
/* Now invert Y if needed.
* Gallium drivers use the convention Y=0=top for surfaces.
*/
if (st_fb_orientation(fb) == Y_0_TOP) {
miny = fb->Height - scissor.maxy;
maxy = fb->Height - scissor.miny;
scissor.miny = miny;
scissor.maxy = maxy;
}
if (memcmp(&scissor, &st->state.scissor, sizeof(scissor)) != 0) {
/* state has changed */
st->state.scissor = scissor; /* struct copy */
st->pipe->set_scissor_states(st->pipe, 0, 1, &scissor); /* activate */
} }
if (changed)
st->pipe->set_scissor_states(st->pipe, 0, ctx->Const.MaxViewports, scissor); /* activate */
} }

37
src/mesa/state_tracker/st_atom_viewport.c
View file

@ -43,7 +43,7 @@ update_viewport( struct st_context *st )
{ {
struct gl_context *ctx = st->ctx; struct gl_context *ctx = st->ctx;
GLfloat yScale, yBias; GLfloat yScale, yBias;
int i;
/* _NEW_BUFFERS /* _NEW_BUFFERS
*/ */
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
@ -61,26 +61,29 @@ update_viewport( struct st_context *st )
/* _NEW_VIEWPORT /* _NEW_VIEWPORT
*/ */
for (i = 0; i < ctx->Const.MaxViewports; i++)
{ {
GLfloat x = ctx->ViewportArray[0].X; GLfloat x = ctx->ViewportArray[i].X;
GLfloat y = ctx->ViewportArray[0].Y; GLfloat y = ctx->ViewportArray[i].Y;
GLfloat z = ctx->ViewportArray[0].Near; GLfloat z = ctx->ViewportArray[i].Near;
GLfloat half_width = ctx->ViewportArray[0].Width * 0.5f; GLfloat half_width = ctx->ViewportArray[i].Width * 0.5f;
GLfloat half_height = ctx->ViewportArray[0].Height * 0.5f; GLfloat half_height = ctx->ViewportArray[i].Height * 0.5f;
GLfloat half_depth = (GLfloat)(ctx->ViewportArray[0].Far - ctx->ViewportArray[0].Near) * 0.5f; GLfloat half_depth = (GLfloat)(ctx->ViewportArray[i].Far - ctx->ViewportArray[i].Near) * 0.5f;
st->state.viewport.scale[0] = half_width; st->state.viewport[i].scale[0] = half_width;
st->state.viewport.scale[1] = half_height * yScale; st->state.viewport[i].scale[1] = half_height * yScale;
st->state.viewport.scale[2] = half_depth; st->state.viewport[i].scale[2] = half_depth;
st->state.viewport.scale[3] = 1.0; st->state.viewport[i].scale[3] = 1.0;
st->state.viewport.translate[0] = half_width + x; st->state.viewport[i].translate[0] = half_width + x;
st->state.viewport.translate[1] = (half_height + y) * yScale + yBias; st->state.viewport[i].translate[1] = (half_height + y) * yScale + yBias;
st->state.viewport.translate[2] = half_depth + z; st->state.viewport[i].translate[2] = half_depth + z;
st->state.viewport.translate[3] = 0.0; st->state.viewport[i].translate[3] = 0.0;
cso_set_viewport(st->cso_context, &st->state.viewport);
} }
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]);
} }

4
src/mesa/state_tracker/st_context.h
View file

@ -115,8 +115,8 @@ struct st_context
unsigned size; unsigned size;
} constants[PIPE_SHADER_TYPES]; } constants[PIPE_SHADER_TYPES];
struct pipe_framebuffer_state framebuffer; struct pipe_framebuffer_state framebuffer;
struct pipe_scissor_state scissor; struct pipe_scissor_state scissor[PIPE_MAX_VIEWPORTS];
struct pipe_viewport_state viewport; struct pipe_viewport_state viewport[PIPE_MAX_VIEWPORTS];
unsigned sample_mask; unsigned sample_mask;
GLuint poly_stipple[32]; /**< In OpenGL's bottom-to-top order */ GLuint poly_stipple[32]; /**< In OpenGL's bottom-to-top order */

2
src/mesa/state_tracker/st_draw_feedback.c
View file

@ -156,7 +156,7 @@ st_feedback_draw_vbo(struct gl_context *ctx,
* code sends state updates to the pipe, not to our private draw module. * code sends state updates to the pipe, not to our private draw module.
*/ */
assert(draw); assert(draw);
draw_set_viewport_states(draw, 0, 1, &st->state.viewport); draw_set_viewport_states(draw, 0, 1, &st->state.viewport[0]);
draw_set_clip_state(draw, &st->state.clip); draw_set_clip_state(draw, &st->state.clip);
draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL); draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
draw_bind_vertex_shader(draw, st->vp_variant->draw_shader); draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);

9
src/mesa/state_tracker/st_extensions.c
View file

@ -779,4 +779,13 @@ void st_init_extensions(struct st_context *st)
if (!ctx->Extensions.EXT_transform_feedback) if (!ctx->Extensions.EXT_transform_feedback)
ctx->Const.DisableVaryingPacking = GL_TRUE; ctx->Const.DisableVaryingPacking = GL_TRUE;
} }
if (ctx->API == API_OPENGL_CORE) {
ctx->Const.MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
if (ctx->Const.MaxViewports >= 16) {
ctx->Const.ViewportBounds.Min = -(float)ctx->Const.MaxViewportWidth;
ctx->Const.ViewportBounds.Max = ctx->Const.MaxViewportWidth;
ctx->Extensions.ARB_viewport_array = GL_TRUE;
}
}
} }