python: New state tracker which exposes the pipe driver to python scripts.

Still under development. Just barely works.

1 files changed, 158 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/python/samples/simple.py b/src/gallium/state_trackers/python/samples/simple.py
new file mode 100644
index 00000000000..77e182b6447
--- /dev/null
+++ b/src/gallium/state_trackers/python/samples/simple.py
@@ -0,0 +1,158 @@
+#!/usr/bin/env python
+##########################################################################
+# 
+# Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+# All Rights Reserved.
+# 
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sub license, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+# 
+# The above copyright notice and this permission notice (including the
+# next paragraph) shall be included in all copies or substantial portions
+# of the Software.
+# 
+# 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 NON-INFRINGEMENT.
+# IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+# 
+##########################################################################
+
+
+from gallium import *
+
+
+def save_image(filename, surface):
+    pixels = FloatArray(surface.height*surface.width*4)
+    surface.get_tile_rgba(0, 0, surface.width, surface.height, pixels)
+
+    import Image
+    outimage = Image.new(
+        mode='RGB',
+        size=(surface.width, surface.height),
+        color=(0,0,0))
+    outpixels = outimage.load()
+    for y in range(0, surface.height):
+        for x in range(0, surface.width):
+            offset = (y*surface.width + x)*4
+            r, g, b, a = [int(pixels[offset + ch]*255) for ch in range(4)]
+            outpixels[x, y] = r, g, b
+    outimage.save(filename, "PNG")
+
+
+def test(dev):
+    ctx = dev.context_create()
+
+    width = 256
+    height = 256
+
+    # disabled blending/masking
+    blend = Blend()
+    blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE
+    blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE
+    blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO
+    blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO
+    blend.colormask = PIPE_MASK_RGBA
+    ctx.set_blend(blend)
+
+    # no-op depth/stencil/alpha
+    depth_stencil_alpha = DepthStencilAlpha()
+    ctx.set_depth_stencil_alpha(depth_stencil_alpha)
+
+    # rasterizer
+    rasterizer = Rasterizer()
+    rasterizer.front_winding = PIPE_WINDING_CW
+    rasterizer.cull_mode = PIPE_WINDING_NONE
+    rasterizer.bypass_clipping = 1
+    #rasterizer.bypass_vs = 1
+    ctx.set_rasterizer(rasterizer)
+
+    # viewport (identity, we setup vertices in wincoords)
+    viewport = Viewport()
+    scale = FloatArray(4)
+    scale[0] = 1.0
+    scale[1] = 1.0
+    scale[2] = 1.0
+    scale[3] = 1.0
+    viewport.scale = scale
+    translate = FloatArray(4)
+    translate[0] = 0.0
+    translate[1] = 0.0
+    translate[2] = 0.0
+    translate[3] = 0.0
+    viewport.translate = translate
+    ctx.set_viewport(viewport)
+
+    # samplers
+    sampler = Sampler()
+    sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE
+    sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE
+    sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE
+    sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE
+    sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST
+    sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST
+    sampler.normalized_coords = 1
+    ctx.set_sampler(0, sampler)
+
+    #  texture 
+    texture = dev.texture_create(PIPE_FORMAT_A8R8G8B8_UNORM, width, height, usage=PIPE_TEXTURE_USAGE_RENDER_TARGET)
+    ctx.set_sampler_texture(0, texture)
+
+    #  drawing dest 
+    surface = texture.get_surface(usage = PIPE_BUFFER_USAGE_GPU_WRITE)
+    fb = Framebuffer()
+    fb.width = surface.width
+    fb.height = surface.height
+    fb.num_cbufs = 1
+    fb.set_cbuf(0, surface)
+    ctx.set_framebuffer(fb)
+
+    # vertex shader
+    # vs = Shader()
+    #ctx.set_vertex_shader(vs)
+
+    # fragment shader
+    #fs = Shader()
+    #ctx.set_fragment_shader(fs)
+
+    if 0:
+        nverts = 4
+        nattrs = 1
+        vertices = FloatArray(n_verts * nattrs * 4)
+
+        # init vertex data that doesn't change
+        for i in range(nverts):
+            for j in range(nattrs):
+                vertices[(i*nattrs +j)*4 + 0] = 0.0
+                vertices[(i*nattrs +j)*4 + 1] = 0.0
+                vertices[(i*nattrs +j)*4 + 2] = 0.0
+                vertices[(i*nattrs +j)*4 + 3] = 0.0
+
+        ctx.draw_vertices(PIPE_PRIM_TRIANGLE_FAN,
+                          4,  #  verts 
+                          2, #  attribs/vert 
+                          vertices)
+    else:
+        ctx.draw_quad(32.0, 32.0, 224.0, 224.0)
+
+    ctx.flush()
+
+    save_image("simple.png", surface)
+
+
+
+def main():
+    dev = Device(0)
+    test(dev)
+
+
+if __name__ == '__main__':
+    main()